I'm hoping someone can give some good advice! I have a Auto Pilot Digital Nano that has not been generating chlorine for over a month. I have been adding liquid chlorine. Called the manufacturer and it seems that all the readings are good. I had a local distributor come out and he ran several diagnostics. He called his local distributor and suggested that I treat the pool for white flies. I treated for that, ran filter 60 hours and nothing! Is buying a new cell the next thing to do. I'm afraid that if it is not the cell and I have to keep buying parts, it will wind up costing me double by the time I'm done. Any help will be appreciated.to do