Originally Posted by
elcruxio
Hairdryer has the same issue as a hot air gun: weight and bulk. Carrying one on tour would be silly. Also it's not a given that there is an electric outlet nearby when the need to use one arises.
Oops, my error. I assumed you were only doing this at home, not on a bike tour.
On a tour, when my drive train gets noisy I just add chain lube from the bottle of liquid lube, I use Finish Line Ceramic (dry version) when touring, takes less than a minute counting the time to dig the bottle out of my handlebar bag and put it back.