I have recently acquired a Nordic Astro. The previous owner had applied a thick layer of glue to the join at the top of the pyramid base. I think it had somehow come loose and they must have thought this was a good idea. Having spent the best part of 4 hours carefully removing the glue I now have a very clean and tidy but wobbly Nordic Astro. I thought you could simply twist the base whilst holding the light bulb holder but this has no effect.