I have 16 inch lava lamp. It appears there is a large glob of wax at top that stays there no matter how cold or hot I get it. There is also a small amount of wax at the bottom of the globe. The lam…

[Lew Wood]

I have 16 inch lava lamp.  It appears there is a large glob of wax at top that stays there no matter how cold or hot I get it.  There is also a small amount of wax at the bottom of the globe. The lamp was shaken at one time.  What steps can I perform to get this working