Mylar seals installation

I have some almost new mylar seals that are coming unstuck.

Last year I had my wings at the shop. They got a new coat of wax and
new mylars were installed. I'm guessing the process of waxing and
the sticking of the mylars became somewhat merged, hence my current
problem.

So now I'm going to attempt to reinstall or replace them myself.

Is it ok to reuse mylars after proper cleaning? If so, how do you
get them perfectly clean? Is acetone all I need?

Do I need more than acetone and sandpaper to correctly prep the
gelcoat of my wing before installing new mylars?

I've heard silicone wash is recommended but have had no luck finding
it locally. Can anyone recommend a source for silicone wash?

Anyone have other recommendations or advice?

Thanks,
John