I’m about to give up and buy an entire new RO/DI system. Been about 3 weeks not hat I’ve been troubleshooting my old one. It makes about 4 gallons a day now and I have no idea why. I’v checked and cleaned the restrictor, all the tubing , there’s 70-80 PSI going into the membrane, when I switch the valve to flush, there is plenty of wastewater volume but still, it barely makes enough water to keep up with my evaporation and a water change is just right out of the question. The membrane is only a few years old. I hate to spend the money on an entire new system but I NEED WATER!!!