HAHAHAHAHA!
Mas OC pa nga yung two bucket method eh. Although, you use only one mitten, ang hassle! To rinse, you have to scrub the mitten on the grit guard, top and bottom, then squeeze all the water out, then dunk it in the shampoo bucket. You're not even sure if there's dirt still trapped in the mitten eh.
With the multiple mitten method, no grit guards, no need to scrub and squeeze, no need to wait for the rinse bucket to fill up with water. I just dunk the mitten in the shampoo bucket and after using it, I just throw it into the empty pail and I get another new mitten for the next panel. No cross contamination. The only water I'm going to use is on the shampoo bucket. Much simpler and faster, diba? I save water as well.
Besides a lot of suppliers in aliexpress are selling by set. Much cheaper than buying only a single piece.