Oh god, while manually cleaning my 40D sensor, I appear to have smeared it with grease from my otherwise excellent Arctic Butterfuly (Visible Dust) cleaning device. See attached - deliberately OOF taken against blue sky
How the heck do I remove this safely - i.e. without worsening the situation?
Please don't say 'send back to Canon': I live in Argentina, and there's no real Canon service centre here. And I'm not due back in the UK for a year, so that's not really an option.
Help!

are you sure its grease? have you tried a blower device on it?
A fair question from Reptilian, but assuming you're already familiar with sensor cleaning as is implied by your use of the Arctic Butterfly, you have no choice but a wet clean (and probably several) using Pec Pads/Sensor Swabs or an equivalent and Eclipse fluid.
You'll need "E2", apparently.