My questions is, how do you handle all the humidity and is it true that all rv get mold here and there?
Keep your RV motorhome well ventilated.
Whenever you boil the kettle, cook or wash up steam is produced. Open the window next to the cooking area to let the steam out. Also keep the lids on pans when you cook.
When ever you have a shower or wash, open the roof vent in the bathroom/wet room and if possible the bathroom window too, to let the steam out.
Don’t underestimate how much Co2 and therefore condensation we produce by breathing. And especially when we sleep. So try to leave a window or roof vent open during the night. Most RVs are kitted out with fly nets to prevent bugs from getting in.
Always wipe up excess moisture straight away. Although the showers and sinks will be sealed, any moisture left hanging around can gradually seep into the woodwork and cause damp. Wipe it up.
Don’t create excess water and steam. For example don’t leave a kettle boiling for minutes (we use a steam kettle in the van to save electricity), instead pour it as soon as it boils.