My bricks are yellowing even though I kept them in storage?

I’m in college and kept my old Legos in storage to keep the dust off them, but I noticed some builds were yellowing. To be honest I’m kind of frustrated with myself I thought I had prevented this. I’m realizing yellowing doesn’t just come from sunlight h guess and dust, does anyone know how to prevent this? Hopefully I can still save the bulk of my collection. submitted by /u/Fit_Salamander_9897 [link] [comments]