I purchased a new Hakko 936 from my local hobby shop in December 2009. Only has about 10 hours (probably less) of "burn" time on it. I went to use it yesterday and it ws having trouble melting solder. When it did melt the solder, the solder would not "wet" the tip. I pulled out my temp gun and the tip only temped about 350 degrees F...climbed to about 370 when I cranked the temp knob all the way up? Any thoughts on what is going on here? Do I need a new heating element already?

Any help would be greatly appreciated.