First summer has been a success, pool has been sparkling all summer. Starting to think ahead to closing, I am going to attempt to DYI and I am curious about what I should do filter wise. I have not backwashed all summer, pressure only moved 1 psi all summer, and the pool has been immaculate. Is there a need to open my filter up and clean it come closing time? Or should I just backwash before I close for the winter? Thanks in advance!