It's so incredibly easy you'll wonder why you never did it. A post for another thread, or even better a discussion over a beer but basically every cleaner contains white vinegar and baking soda, which is exactly what Windex and veggie washes are. To turn them into most anything else (counter top cleaners, stainless steel cleaners, bathroom cleaners, laundry detergent, everything!) involves any order or quantity of castile soap, tea tree oil (a natural disinfectant), citrus oil, borax, and washing soda and different balances of vinegar to baking soda. Need more grit, use more soda in the mix. It's so darn easy. Requires a bit of initial buy-in for some of the stuff (about $60) but the expensive products you use little of and they last forever - when you're making a bottle of cleaner for $0.25 you'll feel great joy. I'll ask the wife for some recipes.
The only thing we don't make a replacement for is dishwasher detergent, we haven't found any purchasable or homemade natural product that performs. Still using Cascade Complete.