If u clean it up now wait about a week before u flip the lights to 12 12. Let it recover from the clean up then flip so it will jump right to the flip and not be stuck on a repair cycle from the clean up. I myself would clean up the whole bottom third now and after flower stretch do a little clean up again then leave it alone. Or if u want wait like everyone else does and keep track of days from flip 2w days from flip do the first clean and 42 days do another thats the 3rd and 6th weeks of flower and finally a final clean up of all fan leaves when u do the 2 week glush. Photo plants are very forgiving unlike autos.