Antec Fans Leaking

[Avarath]

So I recently upgraded my case fans to Antec Prizm (10 total).. I started to notice little dots on my case window. Upon further investigation I found one intake leaking oil. After removing this fan, I noticed the dots again (they show up real slow, not all at once). Looking around I found another fan leaking. Should I just return all of these, or just RMA the two leaking? I'm starting to question the quality control on these fans.

[Alex Atkin UK]

That's really odd, as that side is sucking and the only place oil could escape from is on the other side, so how is it getting on this side?

Are you sure its not coming from somewhere else and being sucked onto the fan blades?  I just can't visualise any way it could get on that side from the fan itself.

[Avarath]

This fan was used as an intake.. so this was facing the back of the case, towards the vent. The other one was an intake also, in the front of the case. If my AIO was leaking, I don't know how the liquid would get on this side of the fan. Since I removed the two fans the "dots" on my glass went away. No other fan has this on it. 

[Avarath]

The middle fan straight back,  and the top front had the oil.