My goggles are bottom of the range Speedo, UV + Ant-Fog but the anti-fog just doesn't work. Never did.
So no need to spend a lot of money on goggles if you have this product.
A few tips that took me a few years to perfect. I'm one of the few people who doesn't have anti-fog spittle!!!
1. Spray on, rub with finger before changing, so leave for about 5 minutes. Rinse briefly when you get in. Use the product every time.
2. If you're warm before you get in, don't put goggles on for 2-3 minutes - allow face to cool down. Stops any perspiration condensing on the cold goggles.
3. When putting on and adjusting goggles, hold your breath! Mostly we're spluttering and gasping when adjusting goggles and treading water - but even a slight amount of breath will condense on the inside, so don't do it.
I can now swim for 3-4K in open water < 16 degrees without ever touching my goggles and they stay crystal clear.