I would not use a hairdryer. There are seals that you do not want to melt, and you are working with fuel.
The correct sequence for starting when COLD is;
1. push decrompression valve in
2. apply brake handle (forward)
3. squeeze throttle and push the on/off/choke lever all the way down.
4 pull starter rope approx 3 times until you hear a false start (engine fart)
5 move on off choke switch up one position to half choke
6 pull starter rope, engine will start, squeeze throttle to release throttle lock and return saw to idle.
7 pull brake handle towards you. you are now ready to cut.
When warm you can skip 3,4,and 5
When flooded use the decompression button, brake on, On/off/choke in the on position (one down) hold throttle full speed and pull starter rope