Cleaning is the most difficult part of the household chore. Cleaning is hate thing to do, because I think it's difficult. I thought cleaning was a clean wipe or erase of dirty parts, but that wasn't it. I think it requires a lot of knowledge and a lot of know-how. Therefore, there are many things that I don't know yet, and it is even more difficult because I don't know how to deal with other pollution and stains.