Yes, even tools designed to keep your home clean need to be, well, cleaned. Take a few cotton balls and isopropyl alcohol and disinfect the bottom of your vacuum cleaner. Over time, your vac can accumulate dirt, germs and bacteria, and a simple cleaning can fix this. If you have a housekeeper, ask them to use your own vacuum at home instead of one they may bring. Their vacuum is used in a variety of different homes and can drag in things like pet dander and other allergens.