Rooftop Tent Mildew Cleaning

This is the method recommended by ARB. For really bad mildew it will require removing the tent from the platform.

Mildew can develop any time your tent is stored wet. It looks bad, smells bad and can damage your tent’s waterproof coatings. DON’T LET IT START.

Alas, if it already exists, here’s how to approach it:

  • Try some light scrubbing with a sponge during a regular cleaning session.
  • If mildew is still apparent, mix 1 oz. of MiraZyme® (or similar product) to 20 gallons of water in a bathtub and dip the whole tent.(Note: Lysol® also works, but its scent is attractive to bugs and critters and is thus not recommended).
  • For spot treatment, use 0.5 oz. of MiraZyme® (or similar product) per 1 gallon of water and thoroughly scrub afflicted areas by sponge.
  • Set up the tent in a shaded spot and allow it to air dry.
  • Then, mix 1 cup of salt and 1 cup of concentrated lemon juice with 1 gallon of hot water.
  • Rub the solution into the visible mildew and once again, allow the tent to dry.

This procedure will stop mildew growth and eliminate the odor, but it will never remove the stain.



Tomas has lived in Colorado since age 5. Having grown up on the Western Slope of Colorado lots of time was spent in the Desert Southwest. Tomas' father introduced him to the love of 4 wheeling at an early age in the high mountains around Aspen, Colorado. While an avid Mountain Biker, Tomas and his Family enjoy adventures in the mountains and desert in the remote locations that can only be reached by 4wd. Day hikes are always a must when on the family trips. While enjoying outdoor activities he wants to share his love as a certified 4wd trainer and ski instructor. Tomas also enjoys caving and cave exploration. Tomas currently resides in Colorado Springs. 

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