get the wrinkles out
(of something) 1. Lit. to remove the wrinkles from fabric by ironing or flattening in some way. This has been packed in my suitcase for a week, and I know I'll never be able to get the wrinkles out of it.
2. Fig. to eliminate some initial, minor problems with an invention, a procedure, a computer program, or a mechanical device. I need more time working with this system to get the wrinkles out.