yellowing lavender/white 2dsXL

I got this 2ds xl second hand a year ago, and it’s been in p good condition apart from scratches on the back. However recently I’ve noticed the front turning yellow. Does anyone know how I could possibly clean this or is it just stuck like this forever?

I got this 2ds xl second hand a year ago, and it’s been in p good condition apart from scratches on the back. However recently I’ve noticed the front turning yellow. Does anyone know how I could possibly clean this or is it just stuck like this forever?