Digital BW, The Print

Weink and MIS both sell cartridges, and both sell cleaning fluid. 
Instructions should be at both sites, though you can do a cartridge 
change, and then a couple of cleaning cycles and you should be fine. 
Check by printing the 6 color purge pattern that you can find at MIS 
and other places. If there is little color making it ont the paper, 
then you are all set. You should probably leave the cleaning carts in 
place while you are away. Cover the printer to keep dust out.