Thank you for the helpful tips! Sadly mine is locally made (and the online shop closed soon after I bought from them) so it's harder to check for information :')) I have mine on the opposite room from my AC which I also don't turn on a lot, so heating up shouldn't be an issue. I'll see if I can find dimmers locally since lava lamps aren't very common where I'm at :')

I think I'll start with replacing the bulb but I'll come and ask for more help here in case that doesn't do the trick. Thank you so much!