Damp Duetto

Hi everyone. Duetto still damp by back doors and in cupboards under fridge and sink.I can not find any water droplets.Cupboard under fridge shows water marks. Does not have fridge vent covers.Could water be getting in through vents? Any thoughts will be really welcome. Thanks

You could check the vents theory by removing them from the outside and peering in !!!
Keith

I don't want to be the bearer of bad news, but have you got underneath your Duetto to look at the vehicle structure under the fridge area? Have a look from rear wheel to the back and make sure the structure is sound. If the dreaded tin worm is present, it could be water getting in from beneath, sprayed up from the wheel, and once in the damp can spread, and in a confined area cause condensation elsewhere. Fingers crossed it's not that, but you need to check.
Jollywalker