Hi there, not sure if here is the best place to post this question but here we go. My DS's nappy leaked when he was having his after lunch nap. There is a small wet patch on the cot mattress and I don't know what would be the best way to clean it. I took the mattress out of the cot and placed it near the window to get some fresh air. What would you do to try to clean the mattress? many thanks for reading my post