Hi, yes I thought that might be the reason - the leaves are very wet overnight.
We bought a rather posh Chapelwood hog house, which I think may be being used, as I've seen a hedgehog looking out of there, and there are definitely leaves being taken in there.
The one I made was out of a sturdy fruit box, with a covering of polythene stapled to it (with an air vent) and I put some fresh pet hay in there and put it facing into a sheltered corner which makes a little sort of tunnel to the opening. I've heaped the old sweetcorn stalks from the garden over it to add to insulation, and in front of it is quite a large potted hydrangea, for more protection - I put some banana chips in the entrance and the hedgehogs found it straight away and seemed to approve
I think it's quite cosy - I'd like it if I were a hedgehog 