I purchased the LG LP0817WSR portable a/c last year. Over the winter I kept it unplugged and fully drained it before I put it in storage. This summer I brought the unit out and have been using it pretty often because of the fires in my area. Recently I have had to drain the unit at least every hour to 3 hours.Why is this happening? Last year I drained the unit about once a week. How long can the unit run before needing to be drained? Thanks a bunch!