Does anyone know if I can get the Mytee system maintainer locally or would I have to buy it online? I've had my Mytee hp 60 for over six years now and have never done any kind of chemical flush of the unit. The water pressure coming out of the nozzle has recently gone down so I'm thinking it might be due to hard water deposits. If not the Mytee specific cleaner, is there a similar product that I might be able to purchase at a local store that would work?