Instruct: Classify a review as either positive or negative.
Query: Sweatmarks Are Gone

I bought this to try and revitalize a couple of my favorite caps. It is simple to use and the dishwasher cleaned all the sweatmarks and most of the funk from my cap. There was some residual dishwasher cleaner (powder) just under the brim that I had to rinse off after, but it wasn't an issue. Maybe liquid detergent would work better? I will be using this again soon for a couple other hats I would like cleaned.