Why Spiders Become More Visible in Homes During September — And A Simple DIY Repellent Hack

As the weather cools and autumn approaches, many homeowners begin noticing an increase in spider sightings inside their homes. While spiders are present year-round, September often marks a noticeable rise in activity, especially around doorways, corners, bathrooms, and other quiet indoor spaces. For individuals who are uncomfortable around spiders, even a small uptick in appearances can cause distress and frustration.

This surge prompts many to seek out ways to deter spiders from entering or lingering indoors, from commercial products to home remedies. Recently, a simple homemade spider-repellent hack shared by TikTok user @hazcolourfulhome has gained attention online, promising an easy and affordable approach to limiting spider presence using everyday ingredients.

The Simple Spider Repellent Hack

On social media, @hazcolourfulhome’s method consists of combining Epsom salt and essential oil in small net bags, which are then placed in key areas throughout the home. The technique, according to the creator, has blocked spiders from entering her living space for years, making it attractive to fellow arachnophobes seeking non-chemical, practical solutions.

While this personal testimony is compelling, it is important to understand that anecdotal evidence does not constitute scientific proof. Users may find the method effective for a range of reasons—such as improved housekeeping, behavior changes, or even the placebo effect—rather than the specific properties of Epsom salt or essential oils. Nonetheless, the hack’s simplicity and low cost make it a popular experiment for those hoping to supplement broader pest-reduction routines.

Ingredients and Preparation: How to Make Spider Repellent Bags

The materials required to make these spider repellent sachets are easily available:

• Epsom salt (standard, inexpensive brands suffice)
• Small breathable or net bags (such as organza sachets or mesh pouches)
• Essential oils (with lemon, mint, eucalyptus, or lavender being favored choices)

To prepare the bags:

1. Fill each net bag with a generous amount of Epsom salt.
2. Add several drops of essential oil (the amount depends on preference and sensitivity).
3. Securely tie the bag.

The scented sachets are then distributed in areas where spiders are commonly noticed, including entryways, corners, and edges of bathrooms or kitchens. The creator recommends placing them on protective surfaces, such as small dishes, to avoid potential oil stains on wood or delicate materials.

Choosing Essential Oils: Varieties and Considerations

The TikTok creator highlighted lemon as a preferred scent but also noted mint, eucalyptus, and lavender as possible alternatives. These fragrances are often cited on home improvement and pest control websites for their reputed ability to deter spiders, based on the idea that certain species dislike strong scents.

While some studies show essential oils can affect insect behavior due to their volatile compounds, there is limited evidence regarding their impact on common house spider species. Spider response can depend on the concentration of scent, local airflow, and the specific species’ sensitivity. As a result, a scent-based repellent should be viewed as an experiment rather than a universal solution.

Safety is an additional concern. Essential oils are potent and can cause irritation to skin, eyes, and respiratory tracts, particularly in children and pets. When using sachets, keep them out of reach and follow the guidance for safe oil usage issued by health authorities.

Why Are More Spiders Visible in September?

Seasonal changes and spider biology explain why September is peak spider season for many households. During late summer and early autumn, male spiders become significantly more active as they search for mates. This increase in movement makes spiders more visible and gives the impression of a sudden invasion, even though many may have been present in the home, undetected, for months.

Male spiders often leave their secluded hiding spots and venture indoors or across surfaces in pursuit of females. This behavioral shift, combined with cooler temperatures that encourage spiders to seek shelter, causes a spike in sightings. The phenomenon is consistent with annual mating cycles observed in many regions across Europe and North America.

Spiders Already Living Nearby: Unseen Residents

The discovery of spiders inside does not necessarily mean they have just come in from outdoors. Many homes provide ideal habitats with undisturbed spaces—inside gaps, storage areas, garages, sheds, window frames, and behind furniture—where spiders can reside unnoticed.

The increase in sightings in autumn is often a matter of visibility rather than population growth. As spiders become more mobile, they emerge from their hiding places and are seen more frequently. Homeowners may mistakenly perceive this as a sudden infestation, when it is a result of seasonal activity and behavioral changes.

Can Epsom Salt and Essential Oil Bags Truly Repel Spiders?

It is crucial to note that Epsom salt itself is not established as a spider repellent by scientific research. The main logic for the DIY method involves the dispersal of strong scents from essential oils. Some insects and arachnids are sensitive to these odors—limonene, menthol, and cineole are derived from citrus, mint, and eucalyptus and are known to affect insect behavior—but evidence is mixed for spiders.

Controlled studies generally find that scent can temporarily discourage spiders from remaining in scented areas. However, it rarely prevents entry or conquers existing spider populations, especially in homes with multiple entry points or abundant food sources.

Therefore, these sachets should be considered as part of a broader pest control strategy rather than a stand-alone solution. Professional pest control experts and university extension programs emphasize that identifying entry points, reducing insect prey, and regular cleaning are more reliable ways to manage spider activity indoors.

Additional Ways to Reduce Spider Sightings at Home

Alongside scent sachets, several practical measures can help minimize spider appearances:

• Inspect doors and windows for gaps or cracks, sealing any openings that provide access.
• Improve weather seals on doors and use mesh screens to block insects, which attract spiders.
• Reduce outdoor lighting around entrances, as lights draw flying insects that serve as spider food.
• Vacuum and clean corners, ceilings, behind furniture, and storage areas to remove webs and insect populations.
• Store belongings in sealed containers and keep clutter to a minimum, limiting hiding places for spiders.

Addressing the Food Source: Why Spiders Enter Homes

Spiders are predators; their presence is often a signal of existing insect issues inside the home. Common prey include flies, moths, mosquitoes, and small crawling insects. By controlling these pests, homeowners can reduce the attractiveness of their homes to spiders. Recommended steps involve:

• Keeping food sealed and crumbs cleaned up
• Managing waste, compost, and moisture sources quickly and efficiently
• Repairing screens and preventing insect entry
• Fixing leaks and drying damp areas to remove breeding sites for insects

Understanding the ecological attraction of spiders helps shift the focus from solely repelling spiders to managing the root causes of their presence.

A Viral Trick, But Not a Guaranteed Spider-Proof Solution

The Epsom salt and essential oil hack is appealing thanks to its simplicity, accessibility, and the positive experiences reported by its creator and followers. However, it is important to draw a distinction between viral household tips and scientifically validated pest-management strategies.

No method provides total assurance against spider activity. Effectiveness depends on spider species, home characteristics, seasonal trends, and local environmental factors. Homeowners may find that combining sachets with the practices described above delivers more meaningful results than relying on fragrance alone.

Should You Try DIY Spider Repellent Sachets?

If you are looking for a low-cost, chemical-free approach, preparing Epsom salt and essential oil sachets is a harmless experiment. Preparation takes minutes, the ingredients are non-toxic if handled correctly, and placement is flexible.

To maximize safety and effectiveness:

• Use essential oils sparingly and follow safety instructions for each oil
• Keep sachets out of reach of children and animals
• Place sachets on protective surfaces to avoid stains
• Combine with regular cleaning, sealing entry points, and insect management for optimal impact

If spider infestations persist or rise sharply, consider consulting local pest-control professionals or university extension services. In most cases, scent-based approaches work best as supplementary measures in a holistic pest-reduction plan.

Why September Feels Like Spider Season

The autumn increase in spider visibility is a normal, cyclical event tied to seasonal mating and environmental changes. Most spiders are harmless and play an important role in ecological balance by controlling insect populations. The appearance of spiders in September should not be interpreted as a sign of home hygiene issues, but as a natural behavior aligned with mating and shelter-seeking.

A homemade sachet, such as the one popularized on TikTok, may help support peace of mind for those seeking alternatives to harsh chemicals. The most effective strategy remains a combination of vigilant housekeeping, sealing potential entry points, managing insect activity, and understanding spider behavior.

Viral tricks like the Epsom salt bags highlight the value of creative household solutions, but their limitations should be acknowledged. For homeowners who wish to avoid unpleasant encounters when opening a bathroom door, even a small preventative step can provide comfort during peak spider season.

Sources

• BBC — Why More Spiders Appear Indoors in Autumn
• Reuters — Spiders Moving Indoors During Mating Season
• CDC — Preventing Insect and Spider Encounters
• Mayo Clinic — Essential Oil Safety
• The Guardian — Spider Visibility in Autumn
• Al Jazeera — Home Spider Invasion and Mating Season

Disclaimer: This content is intended for entertainment purposes only and is not based on real events.