I might follow in some other footsteps here and give up on lava lamps for a while. Seems like everyone I get - it's junk, I have to filter it, it doesn't flow right or just doesn't flow at all. I have wasted more time and money fixing them, than enjoying them.
I have only 3 or 4 lamps that actually work. 2 are china lamps that I had to fix. One was filtered and one had to have the coil replaced. I have 2 midnight lamps that just work. The others are crap. I have lava lamps in boxes I have never even used - god only knows what they look like and if they work.
I am just really tired of throwing my money away on these things. They are cool and beautiful and all that, but not worth the headache. Either the lamp is china junk, the midnights/older lamps are at the end of their lives or you pay out the arse for a mostly new lamp. It just sucks. Really frustrating at this point.
For instance, I have 3 red/clear china globes. Two form the store, one from lava world. NONE flow. They blob up and thats it. One I replaced the coil on, lets off 2 blobs. That's it. Crap crap crap!