Don’t understand this whole thing with asking a customer to use there water to fill up. I do it all the time. Just make sure it’s a place where it’s not a inconvenience for them. I’ve been servicing my customers for over 10 years , so get them comfy with you first . Yes I do bring my own water 15-20 gallons . 2 5 gallon buckets are filled before I leave, an I have 1-2 5 gallon Jerry cans also I fill, but sometimes especially during pollen season I need to fill a bucket once in a while . Trust me you don’t look unprofessional if you ask to fill your bucket. It’s water something that is needed to clean windows .
Locate your out side spigots for future reference. Most times you can get it on the outside of a building /shopping center
Don’t go walking into the new account on the first day an ask for water that’s all !!!