Hi All, My 2005 Prius compressor probably has a very slow leak. It blows not-so-cold air from the A/C, which started last year. I took it in to have it checked for leaks, and the refrigerant they put in was enough to keep it working wonderfully through this spring. Now it's getting hot and I'm noticing the A/C is not cooling quickly enough. The dealership never found the leak, and naturally wants $1000+ to replace the compressor. All I want to do is add some refrigerant, and I expect all will be well again. This shouldn't be too hard, no? And yet all my searching only yields a lot of "it's complicated" answers. So I figured I'd pose the question here. Can I buy a can of R-134A that doesn't contain oil, and simply add it to the system? Is it just a matter of connecting a hose from a can, and running the system? Can someone who has done this please chime in with advice or confirmation? The only concrete advice I've found pointed to R-134a Hybrid Vehicle A/C Refrigerant Oil Charge (3 oz.) - XXXHYB-2 for oil and refrigerant. But that probably contains too much oil. Can someone point to a can of refrigerant that is okay to use? FYI, I've also found a manual at http://zeroreality.net/prius/repair/55%20-%20Heater%20&%20Air%20Conditioner.pdf which goes through the whole draining, recharging, disassembling process, but I don't know any reason to use most of it. The system seems to work, just too slowly. So I'm asking for concrete, minimal instructions rather than "take it to a dealership." Can you please help? Thanks!