How to stay hydrated in Arizona heat??

I live in central Arizona, and it's already miserably hot this year. I am a mechanic, and work in a shop with no A/C, and only a crappy swamp cooler snd fans. Unfortunately I can't complain to the boss about working conditions because I work for myself, and my boss is a real cheap SOB.

I keep a case of bottled water in the fridge, and lately have been mixing one LiquidIV with a bottle about mid-morning. I do struggle to actually drink enough, as I get pretty focused on a task and will suddenly realize that I haven't had any water in several hours, while my shirt is soaked with sweat. Once I get to that point (dry throat/mouth, cramps, etc), it's very hard to bounce back until I get home and cool off.

I know LiquidIV isn't everyone's favorite electrolyte mix, but it's available locally and cheaper than the Body Armors I was buying last year. I am open to suggestions in that realm. But what I would really like some advice on is implementing some system that will help me drink enough water, period. I am fine with plain water, don't drink soda, don't take sugar in my coffee, so it's not a taste issue. I am just very scatter-brained and straight up forget to drink water or eat. This year is going to really suck heat-wise and I want to develop a good habit before it's too late.

Things I have considered are setting a series of alarms, putting up a white board and marking down water intake, maybe getting a big bottle and putting the day's water in ine container so I won't "lose" my water around the shop. I would love to get some input from others in similar predicaments.