I too am a fan of my "air gun" attached to my compressor set at 90PSI for all firearms cleaning needs. Before I got a parts washer years ago, I used Birchwood Casey's Gun Scrubber. It's sort of like brake cleaner, but won't melt plastic, because it doesn't have any Methyl Ethyl Ketone or Acetone in it. In other words: "Brake Cleaner Bad". 
I use low-odor mineral spirits now in the parts washer, which is continually circulated through a filter. My parts washer sits atop a 55-gallon drum of it. In other words: "Mineral Spirits Good."

I use low-odor mineral spirits now in the parts washer, which is continually circulated through a filter. My parts washer sits atop a 55-gallon drum of it. In other words: "Mineral Spirits Good."