I have one and get some water collection in the trough but not a large amount. I cut a cedar piece to fit down in there and that pretty well takes care of it. I check it about once a month, at first I sponged it out but the cedar seems to have relieved the problem. But - just for safety I do not store anything on the hard bottom, keep a lowest level shelf as the bottom level.
I started with 1.5 pounds of 65% but could not hold enough moisture so increased to 2.5 pounds and increased bead moisture to 67%. Now after everything has settled out I am holding at 64-68% which is what I was looking for. After all that I don't have the huge spikes I started off having.
One thing I have started doing is transferring about a weeks worth of supply to my desktop humi (makes the wife happy too since she gave it to me for Christmas long ago) so that I only open the door once or at most twice a week. This made a big difference in the consistancy of the humidity levels and also should help with the extra moisture collection.
Lots of experimenting but I am very happy with the setup now. Have ChasDen drawers ordered so may have to adjust things some when I put them in, just have to experiment again. I also keep the temp at 66 +/- 1 degree.