here is what I would like : same as you did in the past, you fill the bathtub completely up. then, start wetting your hair by dunking your head deep under. Please do it several times, each time staying under at least 10 to 15 seconds. Then two shampoos; Each time, to rinse the shampoos, several deep dunkings with breathholding where again you stay under for at least10 to 15 seconds. If you can longer, even better Then conditioner which you slowly comb. And to rinse it, you do first again 4 to 5 dunkings, each time staying under and breathholding like before. Final rinse head down bent over ...

here is what I would like : same as you did in the past, you fill the bathtub completely up. then, start wetting your hair by dunking your head deep under. Please do it several times, each time staying under at least 10 to 15 seconds. Then two shampoos; Each time, to rinse the shampoos, several deep dunkings with breathholding where again you stay under for at least10 to 15 seconds. If you can longer, even better Then conditioner which you slowly comb. And to rinse it, you do first again 4 to 5 dunkings, each time staying under and breathholding like before. Final rinse head down bent over the tub with the showerhead.