Hamster soup?

I’ve had my boy Angus for almost 3 years now. He’s always drank from the bowl, never had interest in a bottle. Anyway, he just started doing this a few days ago, it’s like an everyday thing now. I change his water daily, obviously have to now😂 But does anyone know why he could be doing this? Or has anyone else experienced this? Is it because he’s getting old and confused?😂 He normally stores his food in hut, which he still has been, after he fills up his water lol