Bubbles in snowglobes?

Hello everyone!

Is it true that most disney snowglobes develop an air bubble after time? I have always taken good care of mine, but still most of them seem to develop a bubble. Is there any way to correct this?

Will a bubble likely get bigger over time? I am looking to buy a new one right now, but can only find the one I want, with a bubble already in it. I find it doesnt look bad on that particular design, but am not sure, as it is expensive....

How do you all feel about having bubbles in snowglobes? Does it bother you? Do you think it ruins the appearance of the globe overall? Do they all get bubbles at some point anyway? Is a bubble likely to grow even bigger?

Advice and opinions appreciated!

I've had almost every snowglobe I've ever had get bubbles. I don't know why, or how to prevent it. Does anyone? The worst was a Hallmark snowglobe where the water turned a thick orange color. Does anyone know why that happens?