Hi Cliff,
I can see where CMS is coming from with the 'Glug Glug System'
We use to use Ecolab concentrates. I found this did save us a fortune; however, I never let the concentrate bottles go on site. I use to have a part timer on the weekend for washing the vans etc and one of his jobs was to fill all the trigger sprays up etc, that where returned to base on Friday evenings.
I have since moved my base of operations etc and once we are back at that level of staffing and contracts, I will revert back to concentrates.
I think you just have to find a way of monitoring their use and then you’re laughing.
Andrew