Some further thoughts on optimum and other detailing products
* Buying bulk is not always a good deal as many auto detailing chemicals have 2-3 year shelf life, 3-5 years for paste wax. The shelf life decreases once the product seal is opened and stored in garages during hot summers. Products that require dilution will also have reduced shelf life when diluted (distilled water will last longer). It's best to buy what you'll use within couple of years and replenish.
Optimum No Rinse, Opti-Clean, and Optimum Car wash are known to have good shelf life (~5 years) and can withstand 120F temperature and freezing/thawing. Optimum Polish and car wax sprays have shorter shelf life and you should only buy what you'll use within 2 years at a time. To prolong shelf life of products in general you can store them inside the house with A/C instead of the garage.
* If you use a foam cannon or pressure washer, try Purple Power Heavy Duty Vehicle & Boat Pressure Washer concentrate ($8/gallon @ Walmart - don't buy the degreaser by accident) and Optimum Car Wash concentrate ($11/32oz @ detailing.com - curbside pickup in Irvine to save on shipping). The Purple Power pressure wash soap is PH 10 and will strip wash old waxes, sealants, and road grime. I use ~2 oz at a time and at $8/gallon it's like 6 cents per oz.
Optimum Car Wash is PH neutral and will not strip Optimum sealant and wax products. You only need 1 cap full (0.5 oz / $0.17 cents) in foam cannon and it works great. I use Purple Power to strip wash every month or two, and Optimum Car Wash or ONR for weekly maintenance washes. Purple Power will in theory reduce the need/frequency for claying your vehicle.
* When rinsing the car with tap water, you can spray ONR solution on exterior via spray bottle before wipe-down to avoid water spots. Get a "ZEP 32 oz professional spray bottle" at Home Depot ($3.28), fill to 15 oz line with distilled water, add 1 oz ONR. Rinse the car with your hose, spray ONR solution on exterior, then wipe. If you're doing this under the sun and it dries with white polymer spots, spray a little ONR solution and wipe. You can avoid this altogether if you use the Garry Dean Wash Method on one car panel at a time.
Some users have claimed that light water spots can be removed by wiping with hot water mixed with ONR. I have not tried this. The pro's prefer Citrol 266 or other degreaser & water spot remover products. I have 2 friends with water spots all over their car's exterior to test this on later.
* Optimum Car wax goes well with Optimum Opti-Seal. The car wax can be applied immediately after opti-seal, versus other products (including the Optimum instant detailer spray) require at least 1 hour curing time for opti-seal.
* Use Optimum Instant Detailer and Gloss Enhancer on car windows & glass. Yes, chuck the Windex and use this on glass.
* If you do not currently own/use sealants and spray on waxes, try the Turtle Wax Ice Spray Wax and Seal & Shine products. The 20 oz Turtle Wax Ice spray wax is $7 at Walmart.com, you can buy retail and ask them to price match their own web site. I've tested this product and it works great for weekly maintenance wash application. It will save you a lot of money over Opti-Seal and OCW (Optimum Car Wax).
* If you want a spray-on wax/sealant to layer on top of sealants, glazes and paste waxes, try Meguiar's Ultimate Fast Finish. This product can be used on bare surface as a sealant with good longevity as well. The downside is it costs $15 and will only last 10-12 applications. Other waxes don't always play nice with glazes, but this product will happily sit on top of whatever and make your car shine. I use it on my in-law's car. Easy to apply -- spray to microfiber towel and wipe.
* Optimum Opti-Bond Tire Gel 32 oz bottle has the same bottle cap as ONR, which makes it terrible for dispensing the product on foam applicators. Take the bottle top from your dish washer detergent bottle -- its' the same size, screw it on and it will dispense the right amounts. Opti-Bond also works great on lower trims. Do not dilute, use full strength. Diluted solutions do not last long when applied. I use "SM Arnold Tire & Trim Dressing Foam Applicator with Plastic Case" ($2.50 @ Detailing.com), it comes with a plastic hard case to keep the foam applicator encased when not in use, and handle on top of foam to keep your fingers clean.
Opti-Bond requires a clean/dry surface to work. When applied to dirty tires it won't last long. Get "Super Clean Degreaser" from Walmart ($9/gallon), dilute & spray on tires and give it a scrub and rinse. Super clean is a general purpose degreaser that can be used on tires, rims, car interior, engine, BBQ grill, laundry, pots and pans, etc. If your car's interior door panel is dirty you can use diluted solution (4:1 or greater) to spray and wipe. Biodegradable, phosphate-free, safer than "LA's Totally Awesome" and "Mr Clean Magic Eraser", you get the idea.
https://superclean.com/dilution-chart-2/https://superclean.com/applications/
* Dish soap and warm water works for cleaning your applicator & polishing pads by hand.
* Some people use Meguiar's Wheel brightener or Super Clean all wheel cleaner on their wheels to make them shine after cleaning. I just spray some car wax on a towel and wipe. Home Depot has a small car detailing section where you can find a neat little lug nut brush ($3.50) that's great for cleaning wheels.