Can anyone tell me the correct way to flush out an A/C system of dirt, sludge, oil, etc. So it will be clean and dry before I put a new compressor on my 94 Grand Prix. I Have a flush gun, just need to know what would be a good solvent, or is there a better way to clean the system. I have read about so many do's and don'ts that it has me where it would better not to put the compressor on there at all, and forget it. I would hate to ruin a new compressor.