use turtle headlight cleaner and sealant, it works

at first i also scared what a few foreign buyer's claimed that this product make their lamp looks worst

but seems it very ok to use here,

yellowish gone and it seal sth on it to prevent it to yellowish fast

so this kind of product need to reapply in some interval times to maintain it

juz don wait until too worst condition, then need buy those headlamp restoring kit quite expensive