Apply with a soft cloth.
How to make vinyl blinds white again.
To do so fill a bathtub with cold water and add 2 to 3 cups of bleach.
And then spray until the brown is gone.
Dust both sides of all the slats of your blinds thoroughly with a dry rag.
You can always switch to aluminum or go to an off white vinyl blind to prevent yellowing from being so noticeable.
Use what you have on hand.
If plastic or aluminum blinds still have stains after routine cleaning you can try a bleach bath.
Do your vinyl shutters have the faded and chalky film on them.
Mix 1 part bleach with 2 parts water.
Spray the vinyl window with the vinegar solution or cleaner and let it sit for several minutes.
In the next picture the left side has 2 coats and the right side only one.
Do this once with the blinds closed and again with them open to make sure you remove all the surface dirt.
Make sure to submerge every part of your blinds in the water and soak them for at least 10 minutes.
I let it dried a bit before closing the blinds and spraypainting again.
Unfortunately once they fade not much can be done.
This yellowing can be from the sunshine or a faulty product.
I used to sell window blinds and because of their price points they are made to be replaced economically.
Vinyl blinds are not good for that reason.
Here are some methods that you can try to see if it will lessen the yellow tones or possible restore them back to white again.
Remove the blinds from your windows and place them in the bleach bath.
You just need to hang the blinds in a way to be able to open and close the blinds.
Spray it lightly again and then use a soft scrub brush to gently clean the frame.
How can you get them looking like new again.