+1. & if you do soak a stem in Oxyclean, I wouldn't do more than ten minutes & I'd follow @Chasing Embers suggestion to use a greased up pipe cleaner to make sure none goes in the airway.
Thanks!
Well, I used Everclear on the Acrylic stem today? Hopefully no significant damage. I use a nylon brush and bristled pipe cleaners followed hot water rinses frequently.