Nu-Calgon 4148-32 (1 qt. Spray Bottle) Cal-Shield Coil Protectant

There was something wrong with this product. I called the mfg. & told them of the slight vinegar odor & light color & they said this was not characteristics of their product & to buy from authorized distributor directly! Amazon needs to buy it from a different vendor or supplier.

This product is pretty much worthless, unless you intend to treat the coils monthly, which would be very expensive. It is much more economical to purchase a better product for more money, and have it last for years.