I've been using brake cleaner -- the cheap, non-flammable stuff from Wal-Mart. I lay an old towel on a flat surface (kitchen floor in my case), dump the loaded, lubed cases on it, spray thoroughly with brake cleaner, fold part of the towel over the cases sprayed w/brake cleaner, and roll the cases around between the two pieces of towel. It takes all of about 1 minute to clean 100 to 150 .45 Colt loads this way.
Been doing this for 6,000 to 8,000 rounds of .45 Colt and .44 Mag with no ignition problems.
If you don't tumble clean your cases each time, and if you size your unlubed cases with a carbide die, you can also use the above method method to clean powder residue/dirt from the loaded rounds.
I read about using "degreaser with a towel" years ago in an old Elmer Keith article.
FWIW,
Paul