My baking soda's been open for over two months now, maybe even three. It's a pretty big box and it's used partially for all sorts of other fantastic things that baking soda's used for (whites, deodourising etc). I'm thinking I should open a new box but I think my mum would yell at me lol. I've been told that so long as the soda still has a vigorous fizz when you add a little vinegar, it's still good for baking. But I'm not entirely sure.
How long would you keep your soda before replacing it?
And even if it wasn't strong enough for baking, you could still use it for cleaning. :)
Liz
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