Ouch, I was so happy after encountering a product that works so fine like spotless... It's also safe on paint and and trim, so I wasn't concerned at all.
How are you using it?
My directions for spotless are to work with the car still wet. See if that solve your issue:
Tools Needed:
.Spotless
.A Microfiber Applicator (that rectangular one works great)
.A low nap Microfiber Towel (I like them better for glass).
- Work a glass at a time, don't go crazy spraying throughout everything. Windshield / Rear window I divide into 2 sections, are enough.
- After final rinsing a wash,
Shake bottle well, spray it (3-4 pumps evenly distributed on surface).
- Immediately grab the MF applicator and first spread it fast over whole glass you're working, then immediately start working it back and forth, up and down, exerting firm pressure on the applicator, moving your hand on speed of light (in resume, Elbow Grease).
Pressure is not as important as working the product even and fast moving.
Get advantage of the moment you're using it to remove the difficult parts that are the corners of glass. The MF applicator allows you to fully work product on virtually any glass (I never found a problem).
On the first 3-4 scrubs, you'll feel something like 'harsh' (more if glass has more waterspots), and then you'll start feeling it smoothing.
This whole process is to take about 1 minute elbow grease on a window.
Immediately, grab the MF towel which is important to be DRY, and REMOVE all spotless residue.
The glass will look very clean, now immediately grab the water hose and spray it (shower type rinses it better IMO) rinsing thoroughly.
If product worked correctly, glass should look totally and EVENLY wet, water will 'stick totally' to it.
Repeat process on other glass.
One Tip: Beware with overspray! Whenever you already worked one glass, you'll notice that it becomes more prone to overspray (I can't explain why).
It's easy to notice, once you overspray the wrong glass you'll see product trying to react again.
Solution*!: Rinse again or even wipe off then rinse again.
Best Practice*: After rinsing one glass, I briefly re-rinse the others already worked to avoid residual product.
After spotless, I like to follow with claying. Glass should look almost perfect (perfect to many people standards).
The 'cat's meow' now is to use a cleansing polish like Pinnacle Black Label Surface cleansing, it takes little product and lightly as a finishing pad, you're not polishing the glass, just deeply cleansing it. Spread it in 3 passes and remove for really spotless glass. (you can use many other polishes but I prefer a cleansing one).
Cherry on top, Apply a layer of Pinnacle Black Label Surface / Glass Coating, and you're good to go.
Again, I'm sorry if explanation above seems obvious, I've shared the way I use because I never found a problem, just great results from it.
Let me know if that helps,
Kind Regards.