guide to cleaning your gun
Take out your bolt and wipe it off and see if your o rings are cracked at all or to hard discolored if so replace them put some oil on each of them. next put some oil into the asa (where the Co2 goes) 5-6 drops should do take your barrel off and dry fire a few times. guess what you have sucessfully cleaned your marker!
Also the 98 is a tank to lack of cleaning but that doesnt mean not to clean it but thats no reason not to.
the manual is here Tipppmann website
http://www.tippmann.com
the manual will tell you how to get the bolt out etc. and also give you cleaning and handeling tips.