Like many pests, fleas hide in dark, sheltered areas, including in the bed. They will seek out crevices in a mattress, so they have easy access to their hosts (you and your pets) as well as somewhere that is warm and hidden. You may also find fleas hiding in carpeting and other furniture.

Most people can get rid of drain flies within a week as long as they remain persistent. This is especially important if you’re using a gentler method like vinegar or boiling water. Any eggs left behind can hatch, and the problem can start all over again. If you can’t get rid of the flies within a week or two, consider hiring a pro.

Flea eggs can’t take heat, so use that information to your advantage. Take any affected clothes and linens and wash them on a hot setting (140℉ or higher) to kill them off. You can also rid carpets and furniture using heat. After vacuuming all surfaces thoroughly, use a steam mop or cleaner to get rid of the remaining flea eggs and residue. 

Flea eggs also can’t handle extreme cold. You could seal affected linens and store them in a freezer. 

There are quite a few opinions regarding using coffee grinds to keep deer out of your garden, with many people convinced of this method. It makes sense that it could work considering deer have a strong sense of smell and likely do not like the smell of coffee grounds. However, there’s no hard evidence supporting the notion that coffee grounds keep deer away, but it may be worth trying.