How to Clean Behind Removable Window Grids

Window grids are also called grilles or divided-light bars. The correct removal method depends on the window brand, model and fastener type.

Can Your Window Grids Be Removed for Cleaning?

Confirm Your Grids Are Removable

A visible edge or seam where the grille meets the glass does not prove the grille comes off — bonded grids can look exactly the same. Check these instead:

• Look for fasteners, clips or plungers connecting an interior grille to the sash.
• Check the window label, brand and model.
• Review the manufacturer’s grille instructions.

And observe these limits:

• Do not assume a grid is removable only because it appears to sit on the glass.
• Do not try to remove grids sealed between panes.
• Do not pry off exterior or permanently bonded grids.
• Stop if the grid does not release with the manufacturer’s expected method.

For help identifying the grid type and whether a removal tool is appropriate, see our window-grid removal guide. Our overview also explains how to identify a removable window grid and what each grille style is called.

How to Remove a Confirmed Snap-In Grille

1. Identify the window and fastener type. Check the manufacturer, product label or owner’s instructions before starting.
2. Photograph the grille. Record its orientation and attachment points before removal.
3. Support the grille. Hold it near the fastener being released so that the grille does not bend or twist.
4. Release one fastener at a time. Follow the starting point and direction specified by the manufacturer.
5. Do not pull from the center. Pulling from the center can bend the grille or damage clips.
6. Stop if it resists. Resistance may mean the grille is bonded, exterior-mounted, between the glass or secured by a different fastener.
7. Lay it flat. Place the removed grille on a clean, soft surface in its original orientation.

Do not insert a tool between the grille and the glass unless the manufacturer specifically approves that tool and method. Andersen’s official instructions, for example, say to disengage fasteners individually and not to pull from the center, while noting that removal varies by fastener type.

What You’ll Need

• Clean, soft microfiber cloths
• Mild soap
• Clean water
• A soft, nonabrasive brush if required
• A clean towel or padded surface for the removed grille
• A manufacturer-approved plastic grille tool, only if specified for that product

Warning: Do not use a metal screwdriver, razor blade, abrasive pad or improvised pry tool against the glass or grille.

How to Clean the Glass and Removed Grille

Glass

• Remove loose dust with a clean microfiber cloth.
• Use a glass cleaner approved for the window’s glass and coatings.
• Use a soft cloth rather than an abrasive pad or scraper.
• Keep cleaning fluid away from unfinished wood and damaged seals.
• Dry the glass before reinstalling the grille.

Wood grilles

• Dust first with a dry, soft cloth.
• Use only a lightly damp cloth when needed.
• Do not soak, rinse or submerge wood grilles.
• Dry immediately.

Vinyl or composite grilles

• Wipe with mild soap and water.
• Use a soft cloth or soft brush for recessed areas.
• Remove soap residue with a clean damp cloth.
• Dry completely.

Painted or metal grilles

• Use mild soap and a nonabrasive cloth.
• Avoid harsh solvents or abrasive cleaners that could damage the finish.
• Dry thoroughly before reinstallation.

How to Clean Behind Grids That Do Not Come Off

Grilles between the glass are sealed inside the insulating glass unit. There is no accessible surface behind them to clean. If the dirt is on the exposed glass, clean the flat interior and exterior glass normally.

If fog, haze or moisture appears between the panes, cleaning will not remove it — it is on the inside faces of the sealed unit and may indicate a failed insulating-glass seal.

Bonded and true divided-light grids should remain in place. Clean each exposed glass section using a small microfiber cloth or other soft, nonabrasive cleaning pad. Do not force a cloth, tool or liquid beneath a bonded grid. Pella and Marvin both distinguish permanently sealed or bonded grille systems from removable interior grilles.

How to Reinstall a Removable Window Grille

1. Confirm the grille is completely dry.
2. Return it to the same orientation shown in the photograph.
3. Align it with the correct fasteners or plungers.
4. Re-engage one fastener at a time in the manufacturer’s recommended order.
5. Support the grille near each attachment point.
6. Do not bend the grille or force a clip that will not engage.
7. Check that every fastener is secure and that the grille sits evenly.

If the grille rattles, sits unevenly or will not reconnect, remove it carefully and inspect the clips. Do not keep pressing harder, because a fastener may be misaligned or damaged.

If a Grid Is Broken or Won’t Re-Snap

Snap-in grilles can become brittle over time, especially vinyl ones. Replacement grille and clip availability depends on the window brand, model, age and grille pattern. Record the manufacturer information and contact the original manufacturer or a qualified window professional before ordering parts.

If the grille problem involves damaged window glass, a failed insulating glass unit or another window-repair issue, contact Allnite Glass to discuss the project. Call (931) 645-2464 or reach out online.