I love my Swiffer Wetjet. When I first bought it, I thought I would be able to reuse the bottles and was quite disappointed when I realized that you couldn't screw off the top to refill it with your own cleaning solution. So I was pleased to find this little tip on Pinterest this morning.
Dip the tip of an empty Swiffer
Wetjet solution bottle into boiling water
for about 10 seconds and the lid twists off (use a towel). Refill with your preferred cleaning solution
at appropriate dilution and re-cap.