Try pushing it in as far as it should be, then crimping the strip a bit tighter to the mountings.. OR.. A bit of quality silicon under each bit and hold it on till dry !! ??
I think you should ask Sargent
I don`t know what type it is but usually it is a use it once, throw away trim.
You can reuse it if you have the time to get in under the retaining edges and prise it back out level again so you can re clip it back on.
Problem is ,getting in behind it to pull out the edging----take it all off and take indoors ,sit down and spend a while on it
Most modern plastic trims are stick on and throw away.
If it's that bad maybe some glue.