I had stuff like that on my Xterra, it wouldn't come out with anything. It's age, I personally think the only way to avoid that is to never let it happen in the first place. On all the vehicles I've ever owned that I neglected that area I never found anything that would effectively restore it.
2013 Genesis Coupe 3.8 Track Edition
2015 Hyundai Sonata Limited, 2016 Pearl White Nissan Altima SR
2019 Nissan Rogue SL
Give DP coating prep polish a shot. I've had it bring back some smooth trim pieces on a few different vehicles. Never would've thought of using it for trim until I read a thread where someone accidentally got some on a cowl and noticed how nice it was when he wiped it off. If you don't want to buy any, I'll even send you some to test drive.
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