Yeah I've had nozzles get dirty and stuck I guess and they end up filling up the whole tub with water. Totally sucks. I have lost 3 tubs with 1 mom and babies because of that. I've been trying the new Reptile Basics nozzles and 2 of the 3 times were with fairly young new styled nozzle. The old style has only given me problems once and they are 4 years old now.