Husqvarna trimmer question of the day

I have a 225L trimmer that is about 12-14 years old. It is still in good shape and runs good. I have always stored this trimmer hanging up with the shaft pointing down. I the last time I used in a few months ago I put it up like usual but when I went to get it down I noticed that it had leaked gas. It appears to have come out the carburetor since the air filter was soaked in oil. It has never done this before. What needs to be done to fix it? I don't have the room to store it laying down so hanging it on the wall is about my only option. Do I need to hang it the other direction? or is there a seal or gasket that needs to be replaced.
I am kinda perplexed as to why it would start leaking now and not for the past 12 years.
Thanks in advance for any help you can supply on this.

 

The carb parts are getting old and worn and apparently the needle is leaking. This could be because of excessive tank pressure buildup (gas cap not venting properly) or the carb needing a rebuild.