The cleaning schedule and procedures are avalable as printable stickers here:

http://www2.mutoh.com/public/Manuals/User%20Operations%20Manuals/VJ-1204/ValueJet /1204 Maintenance.pdf

http://www2.mutoh.com/public/Manuals/User%20Operations%20Manuals/VJ-1304/VJ-1304 printer sticker_flat.tif

 http://www2.mutoh.com/public/Manuals/User%20Operations%20Manuals/VJ-1604/ValueJet 1604 Maintenance.pdf

http://www2.mutoh.com/public/Manuals/User%20Operations%20Manuals/VJ-2606/ValueJet 2606 Maintenance.pdf