1 tablespoon (15ml) lemon juice
1 tablespoon (9g) cream of tartar
Try spot-cleaning stains on light-colored leather with a paste made from equal parts lemon juice and cream of tartar. Apply in an even layer and let sit for an hour or two before wiping off with a damp, clean cloth. Note: Make sure to test on an inconspicuous area first, as the lemon could lighten some types of dye.