John,
They only normally ask you to do the floors in the surgeries, its the dental nurses job to do chairs, worktops, sinks ect..
And you shouldnt have to get involved with clinical waste either, that should all be done before you get in there.
Its mainly waiting rooms, corridors, windows, ledges etc..
They like colour coding, disenfectant on floors.
I take it you are talking about a daily clean? If its a deep clean then ignore me!
Regards
Paul