I have had the patch for almost 4 years now. I wear mine on my butt. I have to change them every 3to4days. I usually change on Thursday and Sunday. The right side on Sunday and the left on Thursday. I did it that way as to remember that the religious right get together on Sundays and the left get together on any day that they can. I do like the patch, but its not for everyone. Some are allergic to the glue that is on the patch, some just can't wear it as it doesn't stick on them or for other reasons. It works great for me.
Sheila