an ultrasonic is very efficient at cleaning. i have a different one but i use the heck out of it. from cleaning cubic inches of frustration (walbro carburetors for chainsaw restorations) to stripped-down firearm parts to montblanc nibs, if you clean little things, it's money well-spent.
for pen stuff, i use water and a little photo-flo. rarely some ammonia. and while I'll hit the timer button and drop them in and let 'er rip when cleaning carbs or gun or car stuff, for pen stuff, I will hold the nib/feed in my fingers and swirl it around when sonicating it. Also lets me know if the water's getting hot, which it rarely does since I don't blast them as long as other stuff.
you can do damage with an ultrasonic but it's worth the little bit or research on what to avoid...
for pen stuff, i use water and a little photo-flo. rarely some ammonia. and while I'll hit the timer button and drop them in and let 'er rip when cleaning carbs or gun or car stuff, for pen stuff, I will hold the nib/feed in my fingers and swirl it around when sonicating it. Also lets me know if the water's getting hot, which it rarely does since I don't blast them as long as other stuff.
you can do damage with an ultrasonic but it's worth the little bit or research on what to avoid...