thanks Telecaster, I've searched reasonably extensively and no one who has wet cleaned the sensor has had a problem (that they are aware of) - so I've ordered a GX7.
I've been researching and agonizing over whether a small mirrorless camera can give acceptable (equal to a Canon apsc) IQ as an alternative to the 5D3 when convenient and inconspicuous carry is a priority.
how do you compare the GX7 and E-M5? I recently printed a couple 13x19s from my son's E-M5, one was sharp, but one wasn't - quite - for reasons that weren't obvious from the metadata and I'm assuming some sort of pilot error