For the first time in 2 years I am having issues keeping the bottom of my pool clean. I've done quite a bit to keep it clean beforehand, have a polaris with a sand/silt bag, a poolskim, nx2 for cleaning the top, cleaned out the de filter in total, etc. Now it seems I have a endless battle trying to clean all the dirt from the bottom of the pool. I was at it for about 4 hours yesterday using my pool brush and pool vacuum and walked out the next day and the place looks like I never touched it. Not totally sure what I'm doing wrong but I was curious how long it takes you to really deep clean your pool.