No, spiders generally can't swim up your toilet because the U-bend traps them, and they can't survive being flushed or navigating the sewer system; those found in the bowl usually fall in or enter through plumbing vents from the roof, not by crawling up the pipes, though some hardy species might survive for a time in water if it's clean. They can walk on clean water due to surface tension, but soapy water or chemicals break this tension, causing them to drown.
Short answer: they don't get carried up through plumbing during the flush. Spiders that appear in or on a toilet after flushing almost always originated from the bathroom environment (tank, bowl rim, drain, or nearby crevices) and simply move to the toilet when disturbed, then climb back out along exposed surfaces.
Here's why : While spiders are known for their ability to climb many surfaces, they can struggle with extremely smooth surfaces like glass. This is because spiders primarily rely on tiny hooks and adhesive setae (hairs) on their feet to grip surfaces.
When a spider is flushed down the toilet, is there any chance of it surviving, and does it feel pain? Some Spiders are more resistant to drowning than others but Spiders generally do not survive being flushed down the toilet, as they drown if they are submerged in the sewer.
How To Get Rid of Spiders
Bathrooms provide spiders with plenty of spots where they can weave their webs and live relatively undisturbed. Cracks, gaps, and openings around windows, doors, or plumbing fixtures make it easier for spiders to enter.
Spiders hate strong, pungent smells, especially essential oils like peppermint, tea tree, and lavender, as well as scents from citrus (lemon, orange), cinnamon, eucalyptus, and cedar, which disrupt their senses. You can deter them with DIY sprays using these oils mixed with water, or use plants like basil and marigolds, or even vinegar, though vinegar's effect is temporary.
You should never flush wet wipes (even "flushable" ones) or sanitary products (tampons, pads), as they don't break down like toilet paper and cause major sewer blockages; other common culprits include paper towels, tissues, cotton balls, hair, dental floss, and cooking fats/oils, which all contribute to clogs and "fatbergs".
Sleeping with a spider in the room is generally safe since most household spiders are harmless and avoid human contact. They usually do not bite unless threatened, and their presence can even help control pests. However, some people may worry about potential bites or allergies.
You should never squish a spider because it can release dozens of baby spiders if it's a mother carrying eggs, attract pests with released pheromones, cause allergic reactions from its internal fluids, leave stains and odors, and you'd be killing a beneficial predator that controls other insect populations. Most spiders are harmless to humans, and squishing them can backfire, worsening pest problems or causing messes.
Spiders avoid people, animals, and most insects – except for the one's they're about to eat of course. As stated above, most spiders are relatively small. That makes them especially vulnerable. Many birds and animals may try to eat spiders, or at the very least, they'll probably interfere with the spider's food source.
Cleaning and decluttering
A tidy home is less appealing to spiders. Vacuuming regularly, removing webs, and keeping storage areas organized can help reduce hiding places. Reduce clutter in closets, basements, and garages, since spiders prefer quiet, undisturbed spaces.
This search for mating opportunities brings them out into the open, making their presence more noticeable to humans. Spiders are the 'worst' or most noticeable during this peak activity period in late summer to early autumn.
Spiders may hide in the corners of the bathroom, under the sink, or even inside the shower or bathtub.
Once flushed, they typically end up in the sewer system where survival is unlikely due to the harsh conditions and lack of food.
While the theory is unproven, it is likely that spiders can detect human fear.
Kill a Spider When You're Terrified
Spiders do not live in nests with other spiders. They are lone hunters. You should not be worried if you see a single spider in your home. But it is possible to have a spider infestation and there are key signs to look for to indicate that you don't simply have just one spider creeping along your floors.
In many Amish homes, rags are a common toilet paper alternative. These rags are typically old clothes that have been worn out. After simple processing, they become practical cleaning tools.
Letting pee sit makes it harder to clean your toilet. This is the best reason I can find for flushing every time you pee. Why? Because the combination of urine and hard water (i.e., water that contains a lot of minerals), if left to sit for a few hours, can create a crusty deposit on the side of the bowl over time.
Use a vacuum cleaner if you need to kill one or just a few spiders efficiently. Spider physiology is not strong enough to withstand the suction of most vacuum cleaners. The force will throw them against the tube or inner chamber of the machine, killing them almost instantly.
Vicks VapoRub contains menthol, a strong smell that spiders may avoid.
Linalool is a proven pest-repelling chemical, and it's common to find it in the most popular brands of bug sprays. For this reason, any dryer sheet that contains linalool stands a good chance of chasing away spiders and stinging insects.