You probably all have had this experience, unless you prefer liquid soap: You're staying in hotel where the shower/bath enclosure is all one gigantic piece of plastic. That enclosure includes a little soap dish, maybe two, that was designed by a sadist. Put your bar of soap there, and it slides right down onto the bathtub floor.
I made many infuriating attempts to balance the soap perfectly before giving up. It fell to the floor every time. What crazy person designed those soap dishes?
But at last I found a solution that I'm happy to share with you. Wet a washcloth, fold it up, and you can balance that on the soap dish. Then put your soap on the washcloth.