I don't know if this is the right forum to ask this question.
I have a friend whose husband died a year or so ago. She has a Class C RV. like my RV. She doesn't know when the tanks were dumped last, I would say it must have been the last time the RV was used, but the RV has been sitting for several years. So my question is what is the best way that the Grey and Black Tanks to be cleaned out and what is the best way to sanitize the Fresh Water Tank is? I have heard that using RidX in the Black Tank might work, or just use Calgon Liquid water Softener in the Grey and Black tanks and drive the RV around for a coulee of miles and then dump it?
Thank You for any ideas.
If I posted this in the wrong forum would the moderator please move it for me?