I used it straight, it's cleaned up the surface dirt but not super clean. The areas under the pockets the most worn I guess.Use white vinegar straight. You can also use a magic eraser. I dip the magic eraser in the vinegar. If you have dark spots, you might be able to bleach them with zit cream, but you run the risk of lightening the spots too much. I've used RIT color remover on leather - again, it is unpredictable how much lightening you'll get. For conditioning, I'd use Cadillac.
Ugh, how can someone be so careless about a bag like this! It's like it's NEVER EVER been cleaned!

