The usual cause for sluggish drains is a build-up of grease hair and soap scum or bath oils. Most drain cleaners require 2 to 6 hours (or overnight) for results. Thrift will liquefy hair and grease in less than 60 seconds Hot water activates Thrifts dry odorless crystals. Within 60 seconds the drain is clear - even on the most difficult drain blockage. Thrift is also great for sewer lines grease traps and septic systems. Thrifts non-acid formula will not harm fine fixtures porcelain and chrome trim polished brass plastic or metal pipes.