If it has a tear in it, you're stuffed I think. I would gently apply sellotape to it and pull it out, and see how it sounds, but I'd get it replaced fairly sharpish. Shouldn't be too expensive (tens of pounds, say). IAG service department can be mailed at firstname.lastname@example.org
I lived with 'pressed in' tweeters on my old B+W's for about a year before I ordered some new ones. The day before I got them replaced I took my dyson hoover to them. Never take a hoover to your tweeters.
My builder dented my ProAcs when he put them up in the kitchen. One pushed in tweeter. And more to the point, he put the bridges back on when I'd purposely taken them off and put them back in the box. Switched them on (I did label every wire beforehand so that he couldn't go wrong, as I biamp). First time, big bang...
Then saw the tweeter and used masking tape gently. Worked a treat.