When I backwash, I reverse the flow a few times for a few seconds after the sight glass is showing clear water. I realize you aren't supposed to run the filter when no DE is in there but I don't do it long. This always kicks up more DE and the sight glass shows cloudy water again. I think this may have been why my grids were so clean when I opened the filter this year. They were clean enough to where I didn't bother pulling them out this time to clean them. They were very clean.

Does anyone else do this?