Is you splendide washer/dryer combo wdv2200xcd not drying?

I have a Splendide washer/dryer combo WDV2200XCD and it decided to not dry my clothes very well. I had to run it for 3 hrs and my clothes were still damp. Well, after looking at a few different articles in the operators manual I found that you might have to run the clean cycle. I live semi annually in my motorhome and don’t use my washer dryer often enough. After I ran the clean cycle, my clothes will dry in the normal time, which for me is about an hour to an hour and a half depending how much I load it. My Splendide washer dryer is the vented type.