I use to maintain a fairly large venomous collection back in the 80's and 90's.
What I would do for the larger more heavy bodied animals was that their Hide box was also a Transfer box. Meaning, on the front of each hide was a groove so I could place a door on it.
While the animal was locked in, I would spot clean their cage. If it needed a complete cleaning, I would simply remove the entire box, animal inside.
For Tree Vipers, like Eyelash and Waglers, I simply removed the branch they were on. I would then Hang that branch in a secure location while the cage was being cleaned.
In keeping venomous for more then twenty five years, I never found myself in compermising position.
In fact, I would still be keeping venomous, if it wasn't for the backward thinking of my state and it's stupid laws.
1998 was what I refer to the death of the Herp Hobby here in Indiana. Unless you wish to keep Iguanas, Bearded Dragons or Balls, your other choices are slim to none.
But that is for another thread in another fourm......