Macbook air touchpad not clicking. It makes an audible click when you press it on the right but not the left

Jonathan, I had exactly the same problem today, and tried to resolve it following the ideas offered in response to your posting. I came to the conclusion that they risked really screwing up your machine, and possibly costing a lot of money to repair the damage unnecessarily done. I solved the problem with a little basic housekeeping aided by a few small 3M Post-It notes. The real paper ones...

Just insert one into the minuscule gap between the trackpad and the case. Gently drag it along, and you may hit some resistance. Chances are, it's a crumb that can be worked loose. Or it may be something sticky, probably just natural oil from your fingers. Work away at it until you can move a Post-It all the way around the sides and bottom edge of the trackpad. Job done. At least on my 2010 MBAir.

Chances are, dislodging a crumb is probably what bending the chassis did for another poster. I'll leave it up to you to consider if that course of action is preferable.