First of all with the Disc Washer system one does not stream a flow of fluid on the leading edge of the brush. One drops across the leading edge 3-4 drops then using the butt of the bottle to spread the drops out. This keeps the D-4 brush from being too damp. You then run the leading edge of the brush for a few seconds over the record and then slowly rotate the brush back to dry the record off.
Also and sadly the newer (RCA era) Discwasher's are crap because they use only simple corduroy as a material and not the directional fibre pads of the older (black) coloured brushes.