Free tool · troubleshooting
Soap fix-it
Batch misbehaving? Tell us what you saw and we'll diagnose the most likely cause, what to do right now, and how to prevent it next time. If a bar might be lye-heavy, treat it as caustic until a zap test says otherwise. Planning the next batch? Start at the calculator.
What went wrong?
Pick everything you noticed — grouped by when it happened. We'll sort the diagnosis worst-first.
While mixing (in the pot)
In the mould
After unmoulding & curing
Pick a symptom above and we'll tell you what's happening, how to fix it now, and how to prevent it next time.