Brake reservoir just started to leak

[MostroS2R]

All of sudden I'm getting a leak from the reservoir? Could it be too much pressure, lever feels hard but brakes are not sticking. 

[Howie]

There should be no pressure in the reservoir.  Exactly where is the leak?  Pee cup or coffin?

[herm]

any chance you are using the rizoma billet reservoirs? if so.....they leak. its a common complaint, without a solution as far as i know.

[Novelo]

Mine had a mysterious leak before ended up being cracked where it wad held by the mount thought it was the cap for a while.

[MostroS2R]

Stock reservoir and it's leaking from the cap. Very little though, more like seeping.
I'll change the gasket and see if that's it.

[Slide Panda]

Pull the gasket clean the faces and ensure there's no built up crud under it. A bit of leaked fluid, even from a change/refill that ends up on the cap can cause corrosion. That corrosion will rough up the cap and can cause an uneven sealing surface - which will lead to more leaks

[corey]

put a sweat band around it. leak solved.