Member exclusive Q&A: What’s that goop in my surfactant bottle?

In the March Q&A, Doris asked: I finished up a litre bottle of Bioterge today and was surprised to find quite a large amount (maybe 10-15% of the total) of a solid/gel/something like that at the bottom of the bottle. I went to get the new bottle I received just a week ago and discovered…...

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