I received a pretty nasty rash on the back of both knees last time I went diving - 3 dives without taking the wetsuit off in between dives. Is there some lotion, cream, gel, etc. that you can use to help prevent a rash. I occasionally get small rubbed spots where my boots hit the fins but this rash covered the whole back part of my knee. I guess I could have had a crease from not pulling it up all the way but it didn't feel like it was fitting funny. Just started hurting after the 3rd dive. I did 2 more dives the next day so that probably didn't help but it would be nice to be able to put something on in advance if I know this is going to be a sensitive spot for me.