Bissell 9400 05321C Proheat 2x won't spray fix

So, as others have said, the water reservoir on these gums up with calcification and makes them not spray any more. The prior video said the heater was in the handle housing... if only... The heater in this unit (05321C) is under the water reservoir and thus much more difficult to get to. Hopefully, this will help if you start experiencing the same problem as this is an expensive unit and not something replaced on a whim... If you figure out a way to mitigate the calcification, please let me know.