Here's a bit of a problem that somebody pointed out to me. Computer screens aren't actually designed to have things held up to them, so there's a possibility that things might go wrong while trying to measure a potato. Just in case, I've decided to put in these warnings. I've also included them in a disclaimer just in case something really bad happens.
I think there are two main things to be wary of:
- Scratching or denting the screen. Be careful with the edge of your credit card, and your finger nails when holding it. Only measure relatively clean potatoes; big chunks of earth could be quite abrasive. If necessary, it would be possible to measure a potato wrapped in a clear plastic bag which would be less abrasive.
- Damaging other computer components. Laptops are really common these days. Laptop keyboards are notorious for allowing bad stuff to enter between the keys and cause serious damage below (usually the processor is directly underneath the keyboard). While measuring a potato does not involve the worst laptop poison (hot sugary coffee) it's conceivable that earth or even water could find its way between the keys during the process.