This is our newest challenge. Just dropped the steps in Sunday and they're 'wobbly.' I can't see how the two little straps they provide to screw into the deck is going to make that much of a difference either. I think we need more weight, although honestly, we've got 120# on it now. I like the bags of water softener salt idea.

Oh, and in my area, the grocery store now carries Ziploc XXL bags. They come 3 or 4 to a package depending on the size you get and they're over 2' long, heavy duty and even have a handle built in. I think it was $6 for the package of 3 super huge bags.