How to Make Yellowed Plastic on Devices White Again: A Detailed Guide

This method is often called “retrobrighting.”

Apply Hydrogen Peroxide:

Coat the yellowed plastic with liquid hydrogen peroxide (3%) or brush on a layer of hydrogen peroxide cream.

Wrap in Plastic:

Cover the treated area with plastic wrap to keep the peroxide from drying out.

Activate with Light:

Place the wrapped plastic under a UV lamp or in direct sunlight for several hours.

Check every 2–3 hours and reapply peroxide if needed.

Rinse and Dry:

After treatment, rinse thoroughly with water and dry.

4. Repeat if Needed

Severe yellowing may take multiple treatments for best results.

Important Safety Notes