There are 3 ways to save on the Swiffer Wet Jet System:
1. Use a coupon to buy the wet jet MOP. Find coupons in your local Sunday paper inside the P&G brandSAVER booklet.
2. Don't bother buying any refill bottles. Too expensive!The cap on the refill bottle will not easily unscrew which makes you think you have to throw it out and buy a new $7.00 (!) refill bottle. But there's a quick way to loosen the cap to re-fill it with your own floor cleaner.
To unscrew the cap: Boil a few cups of water in a saucepan on the stove. Turn off the heat. Immerse the Swiffer WetJet refill bottle, cap side down, into the bowl for about 15 seconds to a minute. Remove and wrap with a towel. Twist off the cap using the towel. It should come right off. If not, put back in the hot water and try again. Watch a demonstration here: http://www.youtube.com/watch?v=3-SWvjkUW-sI use 1 bottle filled with Pine-Sol and water for tile floor, and 1 bottle filled with Old English wood floor cleaner and water. Whenever I need to change the type of floor cleaner for tile or wood, I pop out one and replace with the other bottle.