I have been lax in cleaning out the inside of my hood fan. I run the baffles through the dishwasher 1x/week, clean out the drip cup and of course wipe down the outside, but I've never cleaned out the inside...it's time... The layer of grease build-up isn't too terrible, fortunately, but there's is a thin layer of build-up.

It seems easy enough to access, I can just reach up in there, but what cleaning product do I use? Would dish soap and hot water work, or is there something stronger I should use.

On a related note, how often do you all clean out the inside? It is a bi-annual or yearly chore, or do you do it more often?