If your computer is the only one in your house, or your bandwidth use is the only use that matters to you, you can install a bandwidth monitor on your computer to track how much data you consume.
Checking for Visible Mold. 1  1. Look for telltale characteristics. Mold often has a fuzzy appearance but can also look like a stain if itâs growing on a wall or furniture. 2  2. Check the basement. This should be the first place you look. 3  3. Check the utility room. Look in and around the clothes dryer duct for mold growth.  4. Check small enclosed spaces.
There are always some tracked in mold spores in the air and dust in every building. All mold test kits will detect some mold in the air and dust. You need multiple tests to compare and find the room with the moldiest dust and air. This room will most likely be the source of the contamination.