I cleaned the strainer, changed batteries Duricell, reset the base unit, calibrated the rain with no improvement; backed the 2 bottom adjustment screws out all the way and the unit still reads 8-10 inches of rain per 8 oz test of water. I changed from A to B & C on base and remote units without improvement. The unit is firmly mounted, has no wind sway at all. It worked well for a year in the same location & mount, then suddenly began to read far more rain than occurred. I called CS 262..... phone over a dozen times; the shortest wait time was 70 min, the greatest 405; So I hung up, I don't have that amount of time; CS PLEASE RESPOND TO THIS QUESTION....WHAT DO I DO NOW? The unit was purchased from COSTCO, so if it can't be repaired/calibrated etc I will return it for a full refund.