What's the difference between these two bath bombs" Same recipe, same colourant, similar fragrance oils, same fractionated coconut oil, same molds. Why did the one on the right work out and the one on the right is making me sad with its powderiness"

It's all about the climate!

I became aware of this issue back in 2006 shortly after I started making products. I made a batch of that started to fizz and grow out of the molds only a few minutes after I'd packed them so tightly. After reading and researching, I learned this premature fizzing caused by too much water in the air - the humidity - and that it would be best to save bath bombs for a drier time of year. Well, that wasn't an option as I'm an impatient bugger and want to make things now now now!, plus there's really no such thing as a "less humid time" in this near rainforest place I live, so I adapted my bath bomb recipe to be all about the oils and not the water, and it works well...most of the time.
We have been experiencing a really dry spell of loads of snow and really cold weather for the last four weeks - which is not normal for us in southwestern B.C. - and the day we made our bath bombs at our youth program, the relative humidity was at 27%, the lowest it's been in three months! The kids who used their liquid colourants with reckless abandon were the ones who had the most successful batches because they added the bit of water to the mix that would normally come from the atmosphere.

As a n...