Best way to clean white leather sneakers without yellowing them

Don't use bleach or harsh scrubbing - that's the fastest way to yellow them or damage the leather. Stick with a soft brush and mild soap mixed with lukewarm water, then wipe with a damp cloth and air dry away from direct heat or sunlight. If they're really grimy, a bit of white vinegar on a cloth works well for stubborn marks without the yellowing risk. Keep them out of the sun while drying since UV light is actually what causes that yellow tint over time.