Do you leave any window or vent open to improve ventilation? 2 ways to fix the issue - ventilate and reduce the ambient moisture content inside, assuming the air outside is dryer, or increase the surface temperature of the canvas possibly by means of a storm cover.
We had plenty heating on at night and didn't notice any condensation so not sure if it was the heating, or storm cover that worked best. We did have a damp bed 1 morning after very heavy rain and the bottom of the storm cover touching the Jayco cover but otherwise found the cover a great advantage when camping in winter.
It is attached via metal tracks that are screwed to the underneath of the hard lid. We can keep the cover attached when packing up but will remove it completely during the warmer months and use the privacy screen instead.
We had plenty heating on at night and didn't notice any condensation so not sure if it was the heating, or storm cover that worked best. We did have a damp bed 1 morning after very heavy rain and the bottom of the storm cover touching the Jayco cover but otherwise found the cover a great advantage when camping in winter.
It is attached via metal tracks that are screwed to the underneath of the hard lid. We can keep the cover attached when packing up but will remove it completely during the warmer months and use the privacy screen instead.