Taking hard drive apart in any room that isn't 100% dust free is a bit risky. A speck of dust can slip in unseen and a few days or a few years down the road, the dust can work its way to the head and render it unable to read or you might get something like dirt that can scratch the platter.

This trick shouldn't be used freely, best reserve it for disk whose head is stuck and you absolutely need to get data off the drive. Then make copy of all the data and try not to use the hard drive for critical stuff.