If using hot water to warm the paste container, be sure not to allow water into the paste. You need to get a WiFI smartphone so you aren't influenced to access your email via GPRS as you are commuting. It may be painful depending on the person's toleration level. https://groups.google.com/g/drcbdstore/c/aXasEnhRYcw/m/eye_JCHQAgAJ