Another Ugg Waterproof Spray question

So I bought the spray last winter for my DD's shoes. Do you think its still good, or should I buy another one?

Re: Another Ugg Waterproof Spray question

I say if it doesn't have an expiration date (and I just bought mine but didn't check for a date), then I think it's fine.

I know I've used the aerosol waterproof sprays more than a year after I bought it in the past (not on Uggs though!).