Granite is one of the most durable materials on earth. It handles Kansas winters, summer heat, and decades of weather without cracking or fading. But even granite benefits from occasional cleaning — and doing it the wrong way can cause more harm than good.

If you’re visiting a loved one’s grave and noticing buildup, discoloration, or biological growth, here’s what actually works.

Start with Water — Just Water

Most of the time, plain water and a soft cloth or sponge will take care of light dirt and dust. Rinse the stone thoroughly before doing anything else. This step alone handles more than people expect, especially on polished granite surfaces where debris sits on top rather than soaking in.

Avoid using a pressure washer. The force can damage engraving edges and force water into any existing cracks.

Use a Soft-Bristled Brush for Engravings

A natural or nylon-bristle brush — the kind you’d use on dishes, not a wire brush — works well for getting into carved letters and textured surfaces. Work in gentle circular motions and rinse frequently. The goal is to lift debris, not scrub it in.

This is especially useful in Kansas where wind deposits fine dust and grit into engraved areas over time.

Choose the Right Cleaner

If water alone isn’t enough, use a cleaner specifically formulated for granite or natural stone. D/2 Biological Solution is widely trusted in the monument industry and safe for granite. Avoid anything acidic — no vinegar, no bleach, no household bathroom cleaners. Acid etches the surface and dulls the finish permanently.

Always test a small inconspicuous area first before applying anything to the full stone.

Dealing with Moss and Lichen

Biological growth is common on headstones in shaded areas or spots that stay damp. Don’t scrape it with a metal tool — that scratches granite. Instead apply D/2 or a similar biological cleaner, let it dwell for several minutes, then use a soft brush and rinse thoroughly. Heavy growth may take a second application.

One thing worth knowing: some lichen has been growing for decades and has essentially bonded with the stone surface. Aggressive removal can cause more cosmetic damage than leaving it. If the growth is extensive, that’s a good time to call someone with experience.

Dry the Surface

After cleaning, wipe the stone down with a clean soft cloth rather than letting it air dry. This prevents water spots and streaking on polished surfaces. It also gives you a chance to inspect the engraving up close and make sure everything looks clean.

How Often Should You Clean It?

Once or twice a year is sufficient for most granite memorials in Kansas. Spring cleaning after winter makes sense — salt and sand from icy conditions can leave residue. A second cleaning in fall before winter sets in is worthwhile if the stone is in a heavily shaded or wooded area.

When to Call a Professional

If the stone has deep staining, significant biological growth, or any structural concerns — settling, cracking, or leaning — that’s outside the scope of a DIY cleaning. At Legacy Stonework & Monument we’re happy to take a look and give you an honest assessment of what’s needed.

We also handle date additions and inscription updates if a companion space needs to be filled in. Just give us a call at 316-670-6350 and we’ll walk you through it.