Over the counter Freon recharge kits should be banned ; ill bet theres been some lawsuits, but, evidentally, not enough. Us guys in the HVAC trade have to be certified to handle refrigerants and most have us have graduated from a 2-4 year Trade School. Yet consumers can buy and dispense it into their cars a/c system without knowing anything about the danger, how to determine correct charge, how to purge air from the hoses, et al ??? Something is very very wrong here.