This is a problem I have having to deal with with a family member. His bed smells like farts and his chair that he sits in most of the day smells the same. Sometimes when I try to clean it the smell knocks me over. I have been told the furniture will air out but for 4 yrs the stench is overpowering. I have used all hints on cleaning it. Is this normal for a diabetic. His moms house smelled the same way.I am getting desperate. thanks