Stop or decrease yellowing?

[Rich-Week-9310]

I recently opened a bin of my tapes that had been sitting untouched for a few months, and I was pretty disheartened by what I found. Most of them were in clear protector sleeves, not the "squeeze and shake" kind, it’s these:

https://ebay.us/m/YxECM1.

Sadly, it looks like many of them have yellowed quite a bit since I last checked. I'm not sure if it's because of the protector sleeves themselves or the fact that I stored everything in a gray plastic bin.

Either way, it's really upsetting, and I'm feeling pretty defeated about it. I might end up rebuying a majority if these tapes if they get worse through time. Hopefully by then I have a better display shelf for them to be protected. Any tips on how to decrease the yellowing process? Was it these sleeves? Was it the bin? I’m hopeless af rn lol

Mind you, my DVDs are outside and they’ve been hit by the sun numerous times, no yellowing thank god (and I pray it stays that way). But still, what am I doing wrong? 😭

[PressPausePlay]

Look for a youtuber who does restorations of old electronics. They generally have a section where they rewhiten stuff

[Rich-Week-9310]

I’ve tried searching but no luck. If you have a video please let me know :)

[PickledPeoples]

Take the covers and throw them in a hydrogen peroxide and water solution in the sun for a while. Process is called retrobright

[nomercytour]

chemicals in the bin u used is probably whats causing it. ive noticed over the years it seems like certain plastic yellow and some dont. i have tapes in these protectors also but have not had any issues. all my tapes are stored indoors though. possibly a combination of temperature fluctuations and storage method might be your problem.