i have a beater pinbot i've fixed up. i've noticed the sling shots are getting a little weak. the flippers can make all the shots, but seem a little weaker than they should be. if i cleaned the mechanical parts, would this help? what parts specifically should i clean? i've heard it's not a good idea to add any kind of lubricant to to dust catching and gunk issues. i'd rather not put much more money into it with a flipper rebuild or new solenoids.

thanks for the info. might not get able to it for a little bit since i'm moving in a month, but might be a nice activity to do during down time while searching for a job.