My Hayward chlorinator is over a year old, at the present the pucks seem to be not dissolving at the rate of year ago, actually at times it seems to be not dissolving at all! I've checked the lines, and they are clear, and presently, no blockage at all, also I've set the level on the dial between 2-4. So basically I'm stumped and the pool shows low chlorine readings. Another thought, I'm still using last years pail of pucks.