I recently moved my daughters from their twin loft beds to full size beds with regular frames and headboards. We've never owned smaller beds that weren't against the wall, so we found out the hard way that they shift and slide if you lean on the sides. It was driving me CRAZY. Lean across the bed to grab a pillow and it slides. Walk around the side to push it back and the bed skirt slides up with the mattress. Then you have to pull the bedskirt down. After the second or third time, it gets old. I knew it was a problem I would have to fix.
Did a little searching on the Internet and found that it is a real problem, and people have lots of solutions for it. Safety pin the bed skirt to the box spring, loosely strap the mattress to the box spring (that one was just odd), use spray adhesive to create tackiness, etc. etc.
One suggestion I actually tried, and it worked so well (easy and cheap) I had to share. Buy the no slip shelf liner at Dollar Tree. I found you need four rolls per bed if you have a bed skirt.
First you take off the mattress and bed skirt, then you lay two of the liners down on top of box springs. They are long so they go almost top to bottom on a full bed. We sort of centered them in each half.
Next put the bed skirt back on, then you lay two more shelf liners in exactly the same spot as the original two (right on top with the bedskirt in between.
Lastly you place the mattress back on top. For this job it's best if you have two people, since you have one shot to get it on there perfectly centered. Remember it's not going to slide anymore :).
And that's it. Just try to bump it with your knee. It won't budge. I'm so thrilled I just had to share my tip of the day :)
I did this with all three full beds we now have, and it worked on all of them. Two are single sided mattresses and one is double-sided (all three slid slightly if you bumped them). So it works on both kinds of beds. I understand some beds now come with gripper fabric on top of the box spring and on bottom of the single-sided mattress, and thats where they got the idea. None of mine did unfortunately, but this is the solution.
I'm going to post photos of the actual bed and steps some day. For now just a photo of the actual product so I can pin it :)