bed

Will the smell of mazi on one's linen render it impure?

Q:

1. I was wondering if the pillows that have been stained by the smell of madhiy through clothes but not directly stained by the moisture itself are impure? (There's no smell on them anymore). I just embarrassingly knew about madhiy this week and I'm trying to repent and avoid sinning thoughts. I masturbate quite often using my pillows before and I'm worried about other things that could have been stained by the smell from the pillows. 

2. I haven't washed anything on my bed and I'm still using them for sleeping and I couldn't possibly wash everything as I don't know which thing could also have been stained by the smell. As they are no visible traces of impurity, I let them dry under the sun is this okay?

3. And I'm also having doubts as sometimes when my feet and hands are wet I get on the bed and I'm wondering if my feet and hands become napaak? My indoor cat also loves to lay on my bed and walk around the house, does this mean I have to wash her?