My AC was not as cold as it once was so 2 weeks ago I went to NAPA autoparts and bought the DIY recharge unit and after using it my AC got worse!
So I brought it to a Local Wrench who evacuated the system and recharged to proper poundage. Everything is Ice Cold again!
He said I most likely overcharged the system
and that can make it not work just as easy as a undercharged system.