I currently use 3 different solder pastes. Do I need three different stencil cleaners?
No! With Smart Sonic's 440-R SMT Detergent, you will be able to clean any type of solder paste in the same machine at the same time.
Other stencil cleaners use chemistries that only selectively clean a few types of solder paste. They may clean RMA well but fail when attempting to clean no-clean or lead-free. (Alcohol is a good example of a selective or "vertical" type of chemistry).