I've recently been given a lamp from a friends loft. Upon heating all the wax moved directly to the top and has stayed resolutely at the top. Even turning off has not resulted in it resettling. The coil is at the bottom. The wax at the top looks as if it has many bubbles - and am guessing it has had a mistreated past (from reading some posts to this forum) - and I am not that hopeful about the prospects of getting this one going again.
Is there anything people can suggest I try before declaring life extinct?