i have been noticing that the top of my vinyl where the top rail is has gotten kinda dark and sticky. i have tried to use the pool water and a brush to clean it but to no avail. i tried a magic eraser on it this morning and it worked. i just have to make sure that none of the "shavings" from the eraser get in the pool. was curious if anyone has used this method or if someone might have a better cleaning method?