Last year we added a salt system after resurfacing our pool. We have the Pentair intellichlore system. Firs 8-10 months, salt easily adjusted using plus minus buttons. I noticed over the past 4 months or so I have to have it maxed and do a boost twice a week to barely hit the levels I need. I cleaned it thinking that would help but no change. All lights are green and I am at 3750 ppm per test strips. Green lights always flashing in succession and the all together under boost cycle. Thoughts?