I get all my carpet chems from Cobb carpet. In most situations I prespray with their powermax prespray. Has oxidizers, citrus and other various surfactants. PH of 10. If there are a lot of yellow or tannin stains I'll boost it with a dedicated oxidizer like their powder brightener. If its god red stains I use a reducer and a steamer.
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thanks for the info. Do you know if those chemicals are ok to use with a myttee extractor? I usally pre treat and scrub then extract with hot water. As for compounds you need to try wolfgang uber compound or menzerna fg400