wifi stopped working before dropping in fryer at work

as oil is quite thick it may not have travelled too far into the phone but whatever did travel will be a congealed mess.. i'd follow this guide for general advice but it seems you've been quite lucky really! if the phone service worked before the deep frying incident then I'd concentrate on the dock connector of the phone especially the USB connection part. This may resurrect your phone but if not then replace that part or just the antenna/USB section and you may find that wifi is restored too. Wifi antenna is connector 5 (i always get this number wrong but it's the little round pin connection on the top left of the motherboard) it may have dislodged after a fall etc, the antenna itself is pretty well protected so difficult to damage. If that doesn't help and you say you have no phone service is an imei no. displayed in the settings? if not and a clean and restore doesn't sort that out it may be the chip is damaged.

I'd imagine you may also have to spend a fair amount of your cleaning in the headphone jack and your sim slot...

let us know how you get on but if it's currently working as is then there's a good chance you can get full function back.