Due to making hopless mistakes by adding too much or too little drops of water to the mix between passes I have a little spray bottle which gives of a fine mist about three squirts of this onto my brush the process is controlled. Works fine for me
i wet my face but not rinse completely between passes leaving a slick wet film on my face then lather again for next pass. If a third pass is needed i will do the same thing but also put few drops of water from hand to brush, happy shaving!
Between passes, I wet my hand and rub it gently over my face, thus wetting it whilst doing a QC check on the last pass. Then I re-lather on the wet face. This rehydrates the lather for the next pass.
I'll wet my hand in the sink and add a little water to my face. Not quite a rinse, but just enough to liven up any residual slickness and check my progress.