My DS and I had blisters on our trip in February but I think it was because our feet got wet at MGM. I bought us new socks in a gift shop that day but the damage was already done. Talk about discomfort from such a little thing. Next time we will try the roll-on antiperspirant that has been suggested and take extra socks so we can change them right away if our feet get wet. It made walking around the World Showcase a little less enjoyable than it could have been so we are hoping to do that next time without the blisters.