Do you have dehumidifiers in your RV?! So much moisture accumulates in RVs and can lead to mold even from just breathing. (Sounds so gross, but it's true!) Make sure you are using something to absorb moisture. We use these IN ADDITION to our actual dehumidifier that's rated for a 1700 sq ft home. Even though we're only in 325 sq ft! Comment below if you want a link and 10% off at to get yourself a case of these. >>>>>-----------------------------------------------