Digital BW, The Print

I've been using quite a lot of Hahnemuhle PR and White velvet  
recently and I've run into problems getting the  2400 to feed these  
papers.  Two things that might be involved are the bone dry cold air  
here and accumulation of paper coating on the printer rollers.  I was  
using the sheet feeder, but that is now impossible and I have to use  
front loading instead.  Any suggestions for cleaning the rollers in a  
2400?