temperature is high because that is the end of the bowl and temps need to be higher, starting temp i usually use is around 335F, and as the flavor decreases, the temp needs to be increased.. and sense u can load such a large bowl, the concentration of the puff is much higher, because much more budd, lasts a long time and u can actually feel the puffs coming to the head much easier, i find that once it starts to taste like crap and is brown, then it is dust, just because the fresh flavor dissapears to almost like nothing till dust then tastes like dust. then time for a new one. but make sure there is always at least some flavor even when it has less flavor, hahahaa. i have used 1 bowl to get 2 other friends loaded once, and myself again and my brother, and then me again now, and the bowl is now getting near its end.... and then i iwll load a fresh one and hang out and vaporize with the neighbor for a little while.. im not embarrased to take this vaporizer around like i was the last ones i owned, this thing is a HIT!