Hair dryers in the 20?

Yes, you can. You need to buy a straightening brush from a drug store. All you do is point the dryer straight down over your wet hair and comb through it with the brush. Ta-da!

a hair dryer's purpose is to speed up the evaporation process, therefore drying your hair, saving a risk of a cold.

Dry your hair when it is wet. They can also function as a cheap alternative to a heat gun.

A hair dryer blows hot air, that it generates, using electricity, to make your hair, no longer wet, but dry.

Its really easy to straighten your hair with a hair-dryer and slightly harder with a straightener. To straighten your hair using a hair-dryer* you need to comb/brush your hair then get a hair-dryer...