Any help on what to use to top off a low on fluid Astro Nordic Glitter lamp?

[Soylent Green]

The original fluid is about 2 inches low. It has the slow stardust type glitter in it. Any help is appreciated.

[Arne]

I'd try propylene glycol but test if its clouding with a small amount of the original fluid first. there are fluids (like living jewel) which can be clouded completely with as little as one drop.