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I think you needn't clay it again now. Observing the paint during next washing, if there is protection, just enjoy it until its expiration. 12 hours is perfect, but shorter than it won't cause...

It's confirmed to be the seal in the cap by Autogeek.
Thanks for your reply!

Yes, I did. I poured DGLS into a transparent bottle. The white plated-shaped changed little during shaking.

I bought DGLS recently and found there are some white plate-shaped suspending in the bottle. Is this normal? Why?