Lana, Hi, again. I cant think for the life of me, what you have in your mothers home??. Can you give more details about this "mold" stuff thats every where. you say it comes off when cleaned,? is it a dusty type of brown mold and/or does it leave a stain on the hardwood,?( whitish stain)or is it like gritty dust ?.. have a look to see if there are any little holes in the woodwork, and on the floor ? it can be many things, the spores from a fungus ? or wood particals left by woodboring larvae.? if you want us to try and help you, you must come back on this .. ok. Hay", have a nice day .. John 2000.