The current Titleist line includes a wide array of multi-material clubheads, which require special consideration when cleaning. None are supposed to be submerged, since water can infiltrate the clubhead.
Which current clubheads are NOT supposed to be submerged?
915 driver
915 fairway metal
916 hybrid
716 T-MB
716 CM
Not sure about AP1s or AP2s...
Are there others?
WW