Spots and Spills Tip #4: Clear Ammonia works best for dark #stains. Heaven forbid that someone should #spill #wine, ketchup or bleed on your #carpets, but if it happens there is still hope. For these types of #stains you can use one tablespoon of clear (not sudsy) ammonia with three-quarters of a cup of water. Then spray (don’t pour) on the stain and then blot it like with the other treatments. Hydrogen peroxide mixed with water (50/50) can also be very effective for these types of sta..