Decal fog??

Looks like you did everything OK. Fault was probably with the decal, sometimes an uneven distribution of the adhesive on the sheet can cause inadequate adhesive to keep the decal properly sealed & avoid fogging. Another possibility is that you let the decal soak for too long a time, thus washing away some of the adhesive, or that you moved the decal around too much when placing it in proper position.

Regards, Rick

Thanks Rick, I think I let that one soak longer than the others

Thad