I am about to get into a legal dispute with a paint contractor. They have left paint splatter all in my carpet as well as durabond dust chunks. I have taken pictures of this. After many attempts by phone to give the contractor a chance to clean and correct the problem, I get a good feeling they are dodging me now. I have not paid them a penny. Am I ok to take pictures of this and then clean these areas myself or should I leave the evidence as is ? I have cats locked up in a room and don't want to let them out as they can get into the mess and potentially get sick from eating the dust. I also wonder if I change anything, I can make it worse. Should I write a formal complaint and have it send by certified mail ? Which kind of attorney should I be seeking out to discuss the matter further ?