I do that between crops mate, iv always got plants in veg and plants in flower.
As soon as one lot have finished in the flower room they come out, flower room gets cleaned, and the next lot of already vegged plants go into flower.
Then veg room gets cleaned and two weeks or so later im cracking the next beans, then they can veg while the previous lot are flowering.
This way i only have to wait for the flowering time of 2-3months between harvests instead of 4-6wks veg plus 2-3months flower time.
I often have a clean up of the flower room halfway through flower too, all the plants get taken out and i hoover up any soil and wipe down everything with a very mild bleach solution, polish the air cooled reflector glass (dirty glass loses lumens) let it all dry then plants go back in.
ya cant beat a clean ship.