Bathroom Cleaner

• For most common stains and mold spots, standard bathroom mold and mildew spray should provide excellent results. Many different brands can be found anywhere household cleaners are sold.
  These cleaners won't hurt the vinyl and shouldn't leave stains when used. Spray directly onto the dirty areas and allow to sit for several minutes. This will ensure the spray soaks into the mold and grime. Wipe with paper towels, then hose down the seat to remove left over residue. This should remove most of the dirt and stains.
  
  

Rubbing Alcohol

• For more stubborn stains, use a small amount of rubbing alcohol. This should only be applied to small areas and shouldn't be used as an overall cleaning solution on vinyl boat seats. Pour rubbing alcohol onto a paper towel or cotton ball and thoroughly work it into the stain. Rub it with gentle pressure to remove the stain completely, then wash the area immediately with hot water. If left on and allowed to fully dry over a long period of time, the rubbing alcohol could severely damage the vinyl. Completely wash and rinse the area.
  
  

Magic Eraser

• The Magic Eraser is specifically designed to clean dirt and hard-to-remove grime from surfaces such as vinyl. If other cleaners aren't getting the job done, try Magic Eraser. The eraser is found wherever cleaning products are sold. Soak it in water, ring it out and rub the stain, applying heavy pressure. Unlike rubbing alcohol, Magic Eraser requires no additional washing after use.