World's most effective and cheapest acne spot treatment: one un-coated aspirin tablet + 4 drops of water. Mash it up using your finger and apply to problem spots. wait a few minutes and rinse off. Works wonders at reducing redness and swelling and speeding the recovery of painful zits and pimples. Can also be used on entire face as a mask to reduce pore size and prevent acne. A bottle of generic aspirin costs around $1 and will last FOREVER!