Removing Mold Stains from Siding is Simple with MiracleMist! This is what happened when we were asked to compare. A large customer asked us to compare MiracleMist to products sold by Walmart.We did. Here are the results! MiracleMist ENCRMMIC4 Instant Mold and Mildew Stain Remover (32-Ounce Spray Bottle), Blue $29.99 Add to cart Watch these videos to see what customers are saying about the MiracleMist System.