Cleaning a Glass-Front Photo Locket on a Headstone Without Fogging It

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Last spring, I drove three hours to a little cemetary outside Boonville, Missouri, to finally see my great-great-grandmother Elsie’s grave. I’d been putting it off for years. When I got there, the the headstone was completely overgrown with thick, sticky moss and that grey-green lichen that looks like old scabs. But what really stopped me cold was the little glass-front photo locket set into the granite. I could barely make out a dark oval behind the grime. My heart sank. Took me three tries to clean it without fogging the glass from the inside. Worth it. I finally saw her face — a sepia woman with a high collar and sad eyes. This post is everything I learned the hard way, so you don’t fog up your own family’s memory.

What Makes Glass-Front Photo Lockets So Tricky (and Why They Fog)

These lockets aren’t sealed tight like a jar of pickles. They usually have a tiny gap where the glass meets the metal or stone frame — sometimes just a hairline crack from age. When you spray water or cleaner directly onto the glass, capillary action pulls liquid inside. Then it sits trapped against the photo. That’s the fog. And once it’s inside, it’s near impossible to dry without damaging the image. I learned this the messy way. First pass, I used a spray bottle like a fool. Within ten minutes, the inside of the locket looked like a steamed-up bathroom mirror. Big mistake. So rule number one: no direct spraying. Ever.

The Right Tools and Cleaners (Skip the Kitchen Cupboard)

For the stone itself, I used D/2 Biological Solution — it’s pH-neutral and non-ionic, so it kills biological growth without eating into marble or granite. I buy it by the gallon online. For the glass, you need a different approach. Grab a soft microfiber cloth (the kind for eyeglasses, not the scratchy blue shop towels), a small spray bottle with distilled water (not tap — tap leaves mineral haze), and a spritz of plain white vinegar. But here’s the key: never spray anything directly onto the glass. Spray the cloth first. Lightly. Like you’re misting a fern. Then wipe the glass in slow circles. For stubborn crud, I used a wooden toothpick (flat end) to scrape gently along the edges. Plastic scraper works too, but don’t touch the photo. And whatever you do, avoid harsh household cleaners. They can cloud the glass permanently.

Step-by-Step: Cleaning Without Fogging the Photo Inside

Okay, here’s the method that finally worked for me. First, inspect the locket’s edges. If there’s a visible gap, seal it temporarily with a tiny strip of painter's tape across the top edge — just enough to block drips. Then clean the stone around the locket first, using D/2 and a soft nylon brush. Let it sit for 10 minutes, rinse with a gentle water trickle from a bottle (not a hose). Wait for everything to dry completely before touching the glass. Now, for the glass: dampen your microfiber with distilled water — barely wet — and wipe the surface. If there’s hard water spots or old residue, add one drop of white vinegar to the cloth, not the glass. Wipe again. Dry immediately with a seperate dry microfiber. Repeat if needed. Never scrub. If the glass is loose or cracked, stop. Don’t push it. I had a locket where the glass was actually separated from the frame by a sixteenth of an inch — any moisture would’ve flooded the photo. That one I just dusted with a soft brush and left alone. Some things are better left safe than sorry.

When to Call a Pro (and What to Expect They’ll Do)

If the photo inside is already peeling, or the glass is broken, or the locket is made of brass or copper that’s corroded — stop cleaning. You can make it worse. Professional monument conservators have special tools like dental picks, low-pressure steam cleaners (controlled), and desiccant packs to dry interiors slowly. I called one for a different headstone once — cost me $150, but they saved a photo that was literally curling off the backing. For a DIY job, know your limits. If you see rust stains bleeding from the frame, that’s a chemical reaction you can’t fix with vinegar. Skip abrasive tools, skip strong acids or alkaline cleaners, and never use a wire brush on the stone itself. Trust me, I’ve seen the scars on old graves from people who got impatient.

Frequently Asked Questions

Q: Can I use Windex or glass cleaner on the locket?

A: I wouldn’t. Most glass cleaners have ammonia or alcohol, which can seep into the tiniest gaps and attack the photo’s emulsion over time. Stick to distilled water and a tiny bit of white vinegar on the cloth — it’s gentler and safer.

Q: What if the locket is already fogged from a previous cleaning?

A: Try the ‘rice trick’ but carefully. If there’s a gap, seal the locket in a ziplock bag with a few tablespoons of uncooked rice (or a silica gel packet) for 24-48 hours. The rice pulls moisture out slowly. I did this on a small locket and it cleared about 70% of the fog. For the rest, I just accepted it. Fog is better than a ruined photo.

Q: Should I remove the locket from the headstone to clean it?

A: Only if it’s clearly designed to be removable — some are screwed in, others are mortared. If it’s set in stone (literally), don’t pry it. You’ll crack the stone or break the frame. Work around it. If it’s loose, a pro can reseat it properly.

Q: How often should I clean a photo locket headstone?

A: Once a year is plenty, unless you live in a super humid area. More than that and you risk wearing down the glass or loosening the seal. I do mine in early spring before the moss gets aggressive. A soft brush dry-dusting every few months helps between cleanings.

Q: What about using a pressure washer on the stone around the locket?

A: No. Just no. Pressure washers can blast water right into the locket’s seams and also erode the stone surface. Stick to hand cleaning with a soft brush and pH-neutral solution. It’s slower but your ancestor’s face will thank you.