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How to Clean Plastic Window Frames

Updated March 23, 2017

Cleaning your window panes is a quick fix to brightening up your windows, but will do little to lend your home a sparkling clean appearance if they are surrounded by dirty and grimy window frames. Plastic frames can scratch more easily than aluminium, so it is important to take care when cleaning them not to damage the frame. Plastic may also be tougher to clean than other types of window frames, especially if they are stained or soiled with oil or grease. Follow a few quick tips to help lessen your frustration when cleaning your plastic window frames.

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  1. Clean the outside of your window frames by spraying off residual dirt and grime with the spray nozzle of a garden hose. Be sure to get the corners and underneath the frame well, where debris accumulates.

  2. Mix together in a spray bottle 1 teaspoon of dish detergent with 1/2 cup of bleach, filling container with warm water. Spritz the inside grooves of the plastic frame well and allow to sit for 5 minutes.

  3. Scrub tough areas gently with a soft-bristled toothbrush or other soft brush and rinse well with the garden hose. Examine frames for any remaining stains. Apply sprayer solution again to needed areas and repeat.

  4. Remove rust stains from your plastic window frame by applying a commercial rust remover, such as Rust Off, directly on stain; let sit according to manufacturer's directions and rinse well with clean water. Allow to air dry.

  5. Open the windows, vacuuming the inside tracts to remove dust and dirt. Follow up the sides and top and bottom of frames with the duster brush, cleaning well.

  6. Carefully apply the bleach/soap mixture to the grooves and outside of the frames, being careful to avoid walls and other painted surfaces nearby. Wipe any runoff with a cloth

  7. Scrub in between grooves with a soft-bristled toothbrush and rinse with warm clean water on a damp rag. Inspect frames for any residual staining.

  8. To remove stains such as crayon marks, black tar and pencil marks, spray Endust cleaner directly on stain, removing with a clean cloth.

  9. Clean lipstick and oil stains not removed with spray solution with Soft Scrub cleanser on a cloth; rub carefully with a soft cloth until stain is removed, rinsing with clean water on a damp cloth. Rust can be removed with the commercial rust remover following the manufacturer's directions.

  10. Tip

    You can pick up commercial cream cleansers made especially for PVC at the local hardware store that will work well on your frames.


    Avoid using abrasive cleanser and scrubbers on your plastic window frames--they can scratch.

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Things You'll Need

  • Garden hose with spray nozzle
  • Soft-bristled toothbrush
  • Vacuum cleaner with duster brush
  • Spray bottle
  • 1/2 cup bleach
  • 1 teaspoon dish detergent
  • Water
  • Soft cloth
  • Rust remover
  • Vinegar
  • Endust furniture polish
  • Soft Scrub cleanser

About the Author

Abaigeal Quinn

Abaigeal Quinn works as an international entertainment broker in the United States. She is a former news editor and insurance agent who began writing for a daily newspaper in 1995.

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