Yep. Try a white vinager and water. (I use 1/2 c to qt) You can use stronger. Test in a closet. Wet the carpet down thoroughly. Let set for 30 min or so then blot with clean rags. Very good for stains on a mattress, or in your car. (you may have to do several treatments) To clean your microwave, a mix of 1/2 and 1/2 of vin and water in a cup. Boil in the micro. Let set. Wipe out. Voila done. These actually work, yours truely has test them several times.