It depends on the spray and the amount you used , whether or not you may get some "gumming" . Many brands do not gum up the needle. 505 is a tried and true , by lots and lots of quilters.
I would not wash at this point. If you do get some gumming change out your needle frequently. no need to discard those needles , you can wash in warm water or use alchol wipe to remove residue.