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Spider egg sacs are meant to last, so you can't crush them. One of the best ways to deal with them is to vacuum them up and then quickly dispose of your debris in the trash so the egg sacs leave your property permanently. Egg sacs surrounded by little spiderlings means that it has already hatched, but you may be able to catch many of these with a vacuum cleaner, too.

Although weevils aren’t harmful to humans, it’s best to throw out flour (or any food product) if it contains weevils or other pests. However, if you want to salvage food after finding pests nearby in the pantry, you can freeze it for at least four days. To prevent weevils from returning, make sure to store your food in airtight containers or inside your refrigerator or freezer.

You should not see live bed bugs after heat or fumigation treatments, but you may see dead bugs. For chemical treatments, it can take several days for bed bugs to die. However, you may see live bed bugs if they are hiding in areas to avoid insecticides or if they are resilient to the type of treatment used. 

Bleach and freezing are your best bets here. The soft exoskeleton of spiders and spider eggs is no match to household bleach. Create a mixture that’s half water and half bleach and spray it directly onto the egg sac, and the spider eggs will be killed in less than five minutes. Freezing the egg sac or drowning it in cold water is another option.