Hardly ever cleaned my TX 200. Careful with oil as the gun will diesel or ignite with pressure. Can damage gun you will smell it and notice the difference if it happens.
They tend to 'lead' up quicker using crosman premiers..so most wash,clean,then very lightly lube pellets with Krytech..JSB's come with coating from factory and barrel stays cleaner longer...
For your barrel, just run some dry patches thru when accuracy falls off...