I've got a question for experienced/expert bat repair types.

When you're trying to glue together a crack that presents only the tiniest sliver of space, is there some tool or product available with which to sort of neatly inject the glue into that crack?

In the past, I've just kind of let the glue run in as best I could, from a regular Elmer's wood glue bottle, and then spent ten minutes wiping off the excess, but I'm sick of the mess, and thinking there's got to be a better way.