I have the same trouble, I have the sandpaper sticker dots they do not cost at lot, i have also bought some rubber dots at the quilt store, they help. I also bought a handle that you can buy at walmart etc, that you can put near on above your bath tub. It looks like a handle about 12' long with rubber grippers at each end, you move a little lever on each end of the handle and than lay it on your ruler, move the little levers and and it will stick to the ruler. They cost about $10. You can also buy them at your quilt store but they will cost twice that much. They do have small one that are great for using on your small rulers at the quilts stores. At walmart they will be in the bath room department.