I wash and clean all surfaces a snake can contact. As there are few disinfectants that kill on contact or in the presence of organic compounds that means wash with soap, rinse, steam clean, check the edges and corners and spray disinfectant wait 10 min re spray so it does not dry out (in effective if it is not wet) wait 10 again and re spray and a third time 30 min total contact time. Then a full wipe down. I just follow the instructions and do as the disinfectant and manufacturer says to (F10, povidone, CHG, bleach solutions all are about the same)
I can't seem to go faster. It takes me 45 min to an hour just to disinfect the whole rack keeping the correct contact times and wet surfaces. That is all on my knees and back too. 100% pain in butt The tubs are fairly easy rinse, scrub, rinse, spray wait rinse dry. They, the five of them, total for all takes about 30min to 1 hour. The rest of the time is scrubbing the rack interior surfaces, and checking the flexwatt. If you don't bother disinfecting I guess it would be faster...
My experience is racks are far harder to clean but then I am fussy.