Hi Guys,
Just checked ultimate Master is pH 9.5 when in solution but is 'self neutralising'
I think John has made a very valid point about agitation , lets face it the Duo is a toy in that respect.
MS are the phosphate part of the cleaning formulation which are effective in shearing the dirt .
The surfactant is responsible for wetting out and suspending the dirt.
Take out the detergent/surfactant and you have to replace with agitation.
I 'm now going to mention the unmentionable word , TIME.
More agitation requires more time, particularly with a Host or Envirodri
Putting detergent in the tank will remove the need for agitation in most cases.
'Time is money my boy' , your decision.
Cheers,
Doug