When you vacuum up spiders with a regular household vacuum cleaner, several things can happen to them:
Physical damage: The suction force of the vacuum can cause physical harm to the spider. The spider may be crushed against the walls of the vacuum hose or container, leading to injuries or death.
Entrapment: Once inside the vacuum cleaner, the spider is trapped and unable to escape. Depending on the vacuum's design, spiders might get stuck in the dustbin or the vacuum bag, preventing them from crawling back out.
Lack of air and moisture: Vacuum cleaners are not ideal environments for living creatures. The lack of air circulation and moisture inside the vacuum can be detrimental to the spider's health. Over time, the spider may dehydrate and perish.
Disposal: After vacuuming up the spiders, they will usually end up in the vacuum bag or dustbin. When you dispose of the vacuum bag or empty the dustbin, the spider's fate depends on your method of disposal. If you dispose of the waste outside, the spider might have a chance to survive if it's still alive. However, if you dispose of the waste in a sealed trash container, the lack of food, air, and water will likely lead to the spider's demise.
It's important to note that spiders are generally beneficial creatures as they help control other insect populations. If you encounter spiders in your home but don't want to harm them, you can use a cup and a piece of paper to gently capture them and release them outdoors. Alternatively, you can seek the assistance of pest control professionals if you have concerns about spider infestations.