Help! Did I ruin my new slate griddle?

[Nadiapaige]

I just purchased a Weber Slate Griddle, and while applying additional seasoning oil (as suggested in the owner's manual) the area above each burner turned a gray/white color while the oil was burning off (this was prior to cooking on it). Why did this happen? How do I get it back to a nice black, even surface? Thanks in advance for your help!

 

[abmet]

Mine did similar following Weber directions. I think it got bit too dry. My recommendation is to add little more oil to those spots and then cook on it. For me the more I’ve used it the better the surface became.