Opening pool, started SLAM last Thursday. Everything has been working fine. This am I get out & do my am routine. Brushing, backwash, leaf rake. Cleaned strainer out twice before it lost prime as I was brushing up gunk. Now I’ve been trying to get it to prime for an hour. I’ve backwashed, recirculated, put the water hose in the pump housing, left the lid off for several minutes. As soon as I put the lid back on and start it, water drains down and no prime again. I’m certainly not a newbie here, but I feel like I’ve tried everything.