Ask a Barista (Researched Answer, 48h)

One question, one researched answer, within 48 hours: machine troubleshooting, buying decisions, technique, or cafe operations. You get a written answer with sources and links, the same verification standard as the site. Not medical advice, not a substitute for a technician on gas or mains-voltage work.

Pre-launch ordering: the shop register opens soon; until then order this by invoice via the contact page with the product name as the subject. You will receive a PayPal or bank invoice and delivery within 2 business days of payment.

Goes well with: the Espresso Troubleshooter and our editorial standards. Related reading: How Much Caffeine Per Day Is Safe?.