Once I watched the "toilet man" servicing the toilets during turnaround (with no gloves on!)
He then changed trucks at aircraft side and got into the potable water vehicle.
He then came over and topped up the potable water, again with no gloves on.
After finishing, he went back to his cab and ate his sandwiches
I dont want to think about the contamination transferred from one hose to the other .......
I did tell the Captain, and he said he wouldn't have a coffee on his way home