I have tried two 'tips':
1) Use a heat-gun to re-melt the glue beneath the surface. Use a really heavy, flat object to press the surface into place.
2) Use a hypodermic needle to squirt new glue under the surface. Use a really heavy, flat object to press the surface into place.
Neither works for any length of time.
New surfaces are available ($250 at foosball.com). If you choose this route, please post your results; I would be interrested in hearing about the steps you went through. Looking at the table it doesn't seem as though it would be too difficult.
Best of luck...
Paul