How to Remove Hard Water Spots From Car Side Mirrors

Short answer: Side mirrors catch sprinkler and rinse water and dry fast, so spots bake on. Several acid spot removers say on their own labels not to use them on mirrors. Spotless X2 is OK on all car side mirrors, including heated and auto-dimming. Apply it to a microfiber, wipe the mirror, rinse, dry.

We make Spotless X2. This isn’t a lab test, and we’re not claiming it’s #1.

For windshields and car windows, see how to remove hard water spots from car windows. For tinted glass, see what’s safe on tinted car windows. This page is for car side mirrors, not bathroom mirrors.

Why side mirrors are tricky

• The label says no. Some removers warn against mirrors. Chemical Guys Heavy Duty’s label says it “should not be used over ceramic coating, on mirrors, on coated glass, or on coated metal.” Read yours before you start.
• The housing. Mirrors are set in painted or plastic housings with motors and heaters behind them. Don’t flood the seam.
• Paint next door. Spotless X2 is for glass. If you spot the painted mirror cap too, use Dissolve X2 on the paint.

How to do it with Spotless X2

1. Wash and dry the mirror. Work in the shade on cool glass.
2. Put a small amount of Spotless X2 on a microfiber, not into the housing.
3. Wipe the glass until the spots release.
4. Rinse and dry with a clean towel.
5. Protect it. A coat of SFX1 on the clean glass helps water bead off so new spots don’t set.

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FAQ

Can I use a water spot remover on my side mirrors?

Check the label. Some removers say not to use them on mirrors. Spotless X2 is OK on all car side mirrors, including heated and auto-dimming.

Is Spotless X2 OK on heated or auto-dimming side mirrors?

Yes. Spotless X2 is OK on all car side mirrors, including heated and auto-dimming. Put the product on a microfiber, not into the housing, so you don’t flood the seam.

Can I use it on the mirror housing?

Use Spotless X2 on the glass only. Use Dissolve X2 on painted mirror caps.

How do I stop spots coming back on my mirrors?

After cleaning, apply SFX1 to the glass so water beads and rolls off.