Is there any way of relubing a Shimano Hollowtech 2 BB? When I got it, there was shimano snot grease all over it, so I'm thinking either the seals aren't 100% or it was just left over from assembly.

Is it possible to pop open the seals and smear in some fresh grease now and then, as with some sealed bearings, or am I just meant to throw them away when they go all pitted and dry?