Lava not sticking to the coilEdit
If your lava does not stick to the coil and does not flow because of that you can try this.
Turn on your lamp and wait for the wax to fully melt, then remove the globe from the base. Open the globe and pull the coil out with a hangar. Take a low grit piece and fold it in half and put the coil between the folds. Put both hands on the sand paper and rub them back and forth and give the coil a very good sanding. Put the coil back in the lamp and see if the lava sticks to the coil. If it does not stick to all parts of the coil take it out and sand it again.