If your car has tinted windows, the cleaner you use matters. It matters far more than most people realize. The wrong product won't damage the tint immediately. It damages it slowly over months. One day the film will be purple and bubbling.
Here is what causes that, and how to clean tinted glass safely.
Where the tint actually is
This is the part that catches people out.
Aftermarket window tint is a film. It applies to the inside face of the glass. It is not in the glass itself. It is also not on the outside. When you clean the exterior, you clean glass. When you clean the interior, you clean a plastic film. This film has an adhesive layer underneath.
Factory tint is different — the glass itself is dyed during manufacture, so there is no film to damage. Most cars have factory tint in the rear glass and, if anything, aftermarket film added later.
If you are not sure which you have, look closely. Roll the window down slightly. Aftermarket film has a visible edge. It stops a few millimeters short of the frame.
Why ammonia is the problem
Ammonia is the active ingredient in most household glass cleaners, and it works — it cuts grease very effectively.
On tint film it does two things. It breaks down the dyes in the film, which is what causes the purple discoloration you see on older cars. And it attacks the adhesive holding the film to the glass, which causes bubbling and lifting at the edges.
Neither happens overnight. That is precisely why it is a common mistake. Nothing bad appears to happen the first ten times. So, people keep doing it.
Ammonia is unkind to the rest of your interior. It dries out rubber seals. It can cloud or crack vinyl and plastic trim. Overspray on the dashboard is very difficult to avoid. This is especially true when working on a windshield.
How to tell if a cleaner contains ammonia
Check the ingredient list rather than the marketing copy. Look for ammonia, ammonium hydroxide, or ammonia-D.
Do not assume a product is safe. Many automotive glass cleaners still contain ammonia. Do not assume a household cleaner is unsafe. Check it first. Several major brands now sell ammonia-free versions.
If the ingredient list is not printed on the bottle, the manufacturer's safety data sheet will have it.
How to clean tinted windows and tinted glass
The method matters as much as the product.
Spray the towel, never the glass. On tinted windows, this is not optional. Spraying directly means liquid runs down. It wicks underneath the film. This lifts the adhesive.
Use light pressure. Film is softer than glass and will scratch. No scrubbing, no fingernails, no scrapers.
Avoid the edges. Do not saturate the perimeter where the film ends. Wipe toward the center rather than off the edge.
Use microfiber only. Paper towel is abrasive enough to mark tint film over time.
Wait if the tint is new. Freshly installed film needs curing time. Do not clean it at all during this time. This usually takes several days to a couple of weeks. It depends on the climate. Your installer will have told you. If you forgot, wait two weeks.
Test first, whatever the product
This applies to any cleaner, including ours. Aftermarket films vary in quality and age. A product fine on new premium film may not be on a cheap film. This is especially true if it's been on the car for eight years.
Apply a small amount to a towel and clean a low corner of a rear side window. Leave it a day and check the area for discoloration, hazing or any lifting at the edge. Then proceed.
What about the outside?
The exterior face is plain glass. You have far more latitude here. A cleaner with a water-repellent layer earns its place. Rain beads and runs off. It does not sheet and dry into mineral spots.
ClearVision™ Glass Cleaner is for that exterior job. It is also for the interior windshield film. This film causes headlight glare at night. If you have aftermarket tint, check the ingredient list. Test in a corner first. Do this with any product.
Questions?
Have questions about your glass, your order, or which product fits your situation? Reach out to us at https://clearvisioncleaner.com/pages/contact and we will get back to you.
