As Martin said but one difference, we use Mr Muscle Shower Shine for the final rinse/buff up.
Its great for regular work, as a lot of you do regular weekly cleans I would seriously recommend it, once you have the shower screen cleaned all you are doing is keeping it topped up, it seems to break all the fats and hard water down so it doesnt stick
We are in a hard water area and use it all the time at home now, keeps all the clag off the shower screen and the taps, tiles etc keeps it all clean and shiny.
We only found it by accident we did EOT and tennant had left it on site, agent wasnt bothered about all the stuff, it was all to be thrown away so we used it. Funny what you find by accident on these jobs.
Murky