I read this to mean 30 mins of noodle washing, looking somthing like this: 5 agitate, 5 soak, change water, 5 agitate, 5 soak, change water, 5 agitate, 5 soak.
Place the sheer white nylon fabric in the stainless steel wire mesh drainer in the mixing bowl and squeeze the ricer to create emulsion noodles that will fall into the center of the fabric. When the emulsion is completely noodled into the fabric, gather the edges of the cloth and secure them with a rubber band. Fill the bowl with cold tap water (add a few ice cubes) and move the noodle filled fabric around for about five minutes then let soak for five more without agitation. Change the water two more times and wash the noodles as before.