Happens more often than you think. IICR, one scope manufacturer recommends you hitting the objective end on a phone book (not hard of course). Otherwise keep shooting it until it goes away, unless the debris is big enough to block what you're trying to see.
I'll give that a shot. It doesn't block, just enough to be irritating on a $600 optic.
$600, $3000, it doesn't matter the cost it still happens. Sometimes a good (again, keeping in mind you don't smack it hard) smack on a phone book will get rid of it, sometimes shooting the gun will, sometimes its on there good and requires disassembly to clean, at that point if it really bothers you then yes send it back to the manufacturer. It isn't worth cleaning it yourself, unless you have steady hands and just happen to have a glove box with an in and out flow.
