Just back from a trip to Anglesey where believe it or not it didn't rain that much. On the couple of days it did rain we woke to condensation on just one of the double glazed windows in the bedroom. I thought we had a leak but it looks like it's just condensation. The dealer has the van now to check it and fix some minor snags. They tell me it's normal to get condensation when the temp drops outside, even on double glazed windows. Never had any issues like this with our other van. Any thoughts please? Thanks