Get a can of spray gun cleaner , attach the plastic nozzle and spray into all crevices , flood it , work the action and flush out any crud. Do it again then shake out excess and let dry . Spray lubricant , Rem-Oil is good, spray into all crevices, work action , spray again . Shake out all excess and let drain on a towel.
If you want to take it apart it's most important to have gunsmith screwdrivers that fit the screws and have dis -assembly and re- assembly instructions. Believe me when I say this ! I have messed up several guns learning things the hard way.
I don't do anything more than removing the side plate now days and there is one part that can fall out must be replaced correctly to work.
When in doubt ....don't do it !
Gary