hi federico, hope your well. this also happened to my white fluidium. as mathmos no longer make the bottle for this lamp i had to buy a astro white/clear direct from mathmos £23.95 and refill the fluidium bottle. if you need a hand in doing this contact me as it quite tricky and i dont want you wasting your money! i have managed to do this perfectly now and the end result comes out crystal clear and runs like new.
get intouch my friend x chris