How to clean the window PE sunshade if there are stubborn stains?

Cleaning method for stubborn stains on window PE sunshade (safe and effective version)
1. First determine the type of stain
Dust/mud spots: Rinse with clean water and gently wipe with a soft cloth.
Oil stains/food stains: require the assistance of a neutral cleaning agent.
Mold stains/yellowing: requires weak acidic treatment (such as white vinegar).
Ink/pigment: Handle as soon as possible, otherwise it may penetrate.

2. Basic cleaning steps (suitable for most stains)
Remove the sunshade: prevent cleaning agents from flowing onto the windows or tracks.
Pre rinse with clean water: Rinse off surface dust to prevent friction and scratches.
Neutral cleaning agent treatment:
1-2 drops of detergent+1L warm water, stir up foam.
Dip a microfiber cloth/sponge into it and gently pat the stain (do not apply force).
Let it stand for 1-2 minutes: Allow the cleaning agent to decompose the stains, but do not exceed 3 minutes.
Thoroughly rinse: Rinse thoroughly with plenty of water to avoid residue.
Natural drying: Lay flat or hang, avoid direct sunlight (PE material is sensitive to high temperatures).

3. Special stain treatment
Oil stains/lipstick/cosmetics:
Mix baking soda and water into a paste, gently apply for 5 minutes → wipe off with a soft cloth → rinse with water.
Dissolve 1 drop of olive oil first, and then clean with detergent.
Mold stains/stubborn yellow stains:
Spray white vinegar and water (1:10) onto the stain, let it stand for 1 minute → rinse immediately.
Do not use bleach as it can corrode the PE material.
Ink/pigment:
Gently press the wet wipes with an alcohol content of ≤ 70% (test for fading first).
Or toothpaste (non gel type), and then rinse.

4. Absolutely prohibited methods
X  Hard brush/steel wire ball: Scratches must be left.
X  Strong acid and alkali cleaning agents: such as toilet cleaners and pipe uncloggers.
X  High temperature water/steam: PE will deform.
X  Long term soaking: may cause the coating to peel off.

5. Prevent stubborn stains
Regularly use electrostatic precipitators to clean floating dust.
Deal with stains immediately if they are splashed, to avoid them becoming more difficult to clean after drying out.
The sunshade near the kitchen can be removed and washed once a year to reduce oil accumulation.