Stains out of a dress shirt? (Southern New England)

[randomness]

So, I have two shirts which have stains. Mostly, I think it's that dirt is adhering to the sticky bits that held the clear, peel-off size labels on.

In any case, they've been through the wash a couple of times and nothing's taken them off. Anyone have any pointers to someone, professional or not, who can get these stains off my shirt? They're right on the front pocket, so they're really obvious. Otherwise the shirts are fine.

Thanks in advance!