How much castile soap should I use?
Far less than you think – a few drops for hands, a teaspoon for a shower. It is highly concentrated and using it neat wastes it.
Can I mix castile soap with vinegar?
No. They cancel each other out and produce a curdled mess. Use them separately if you use both.
Which scent is best for sensitive skin?
The unscented baby version, which contains no essential oils at all.
Is the large container worth it?
Considerably, per use – but buy a small bottle first to be sure the scent suits you.