I'm at a loss! For the cat not me 
I have a great combination of insomnia and constant fatigue from medical issues so sleep is really precious
Cat used to sleep through and not wake me but his wake up time is getting earlier and earlier. He will wake me by chewing wires
if ignored
He tried to chew this morning while I was stroking him so it wasn't for attention! He has a timed feeder for wet and dry food set for 4.30am for wet and 5.30am for his dry - then he will usually sleep again
He doesn't want to go out - I don't have a cat flap but he isn't fussed about outside
If I shut him in the living room/kitchen (open plan) he will dig up the carpet until it's ruined, if I ignore him and try and sleep again then he will chew wires or rattle stuff constantly
Help?! I can't keep getting to sleep at 3am and being woken at 4am, I'm so tired 