Richard, my 3.7 had exactly the same issue
I assumed it was excess that had just got on the outside as the OE manufacturer assembled it, wiped it off a few times, but it kept re-appearing, no apparent leak though
To save a dealer visit I replaced the clips myself, but the issue came back, the rubber was always 'wet' in appearance
In the end as the Silver Arrow had to attend the MMC for a little warranty tweak, they kindly sorted it on the same visit (new bellows)
