You have a few options. Personally, I use the Zagg Invisible Shield. I've been using them on all my gadgets since the original iPhone, and have had great results. Lately, however, I think they may have changed the adhesive properties slightly. I find the shields are harder to slide around once in place, which makes perfect fits a little more difficult. Just my thoughts, though I could be entirely off base. Also, the water really isn’t a problem. When you’re applying the shield, just keep a towel handy to blot the liquid. If you’re careful, it really shouldn’t be a problem.
You can also check out Moshi. They make the Palmguard, which many people love. It doesn’t use water, just straight adhesion. While I have no experience with the PalmGuard, I recently purchased their ClearGuard keyboard protector for my Unibody MBP, and it’s one of the best computer accessories I’ve ever bought. So I have faith in the company.
For maximum computer protection, I would pair an Invisible Shield with an InCase hardshell protective case. An Invisible Shield will not protect against dents, only scratches.
At first, I thought both products would trap heat and make the computer run hotter. Fortunately, I’ve been monitoring my temperature and notice no increases. In fact, the InCase hardshell actually raises the computer up, which helps with circulation.
If you can’t tell, I’m really obsessed with keeping my computers in “like new” shape…
