Nose pads turn yellow with time due to the sweat on the nose skin that rest on the skin and unlikely lead nose pads to the yellowish color change.
Why nose pads turn Yellow? - Easysight
3 Ways to Clean Nose Pads on Glasses - wikiHow
My Nose Hurts! and I Have Red Marks - How to Adjust Nose Pads On Your Glasses
MRY™ Nose Pads Nose Pieces for Oakley M2 Frame XL Sunglasses
Why nose pads turn Yellow? - Easysight
3 Ways to Clean Nose Pads on Glasses - wikiHow
720armour
How to Safely Adjust Your Own Glasses
My Nose Hurts! and I Have Red Marks - How to Adjust Nose Pads On Your Glasses