Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good on your boat

Since a boat sits week after week on the water, it develops mildew. As I didn't want to ruin the fabric or vinyl with bleach, it wasn't until I found this that I was able to get rid of the mildew. It works fine, has a pleasant odor, and doesn't harm fabric. I have also used it on the shower curtains with excellent results. When mildew develops on house interior walls, I reach for this. With further information (see below) I will be very sparing in any usage and try to avoid using it whenever possible.