No need to soak it. It is pretty pliable/pliant (sqooshy?)
I noticed it is a wee bit longer. Since I just painted the dash with a single stage metallic, and did not want to mix a batch just for touchup, I decided not to us a file to make the slot a little longer, and put it in and used a little "Shoe Goo" to glue it on.
Otherwise it wants to "pooch out" a little. (Being a perfectionist and all nitpicky, it bothered me, even setting in the garage, lights out, glove box door closed, convertible top up, windows rolled up, and I lay in bed, tossing and turning for three hours, and finally got up, went out and glued that sucker in right and proper.)
(over)slept like a baby...