Don't throw them away!
This is uber-super-duper-cool. We accidentally had a dirty swiffer cloth go into our washer. It came out intact, clean and dry and staticky! It’s reusable! We use one a week…so we’ll see how long this will last.
Stick that one in the craw of perceived obsolescence.
Sunil’s update: We have now been using the same Swiffer sheet for 3 weeks now (washing after every use) with no problems!!