The rubber strip along the bottom of my garage door seems to be sticking to the concrete floor causing the door to jump and catch when the button is pushed. I have replaced the strip with a new one and applied a silicone spray along the bottom of the strip. It is still sticking. I have repeatedly cleaned the concrete flooring with various cleaners and sanded the area to remove any sticky substances. Still sticking. Do you have any ideas as to the cause of and or to the solution to this problem?