hey all....I looked on the FAQs but couldn't find anything. How would you clean the inside of a cerises speedy? I am trying to sell it and noticed some marks on the inside (were there when I bought it)....one of them looks like maybe makeup? I want to use something that won't stain the canvas...but I think it's going to take more than just plain water. I have some Shout disposable wipes....you think they would leave a mark?