what should I do here?

  every night my hamster wheel squeaks and it keeps me up all night
I purchased a Silent Spinner wheel - I have had it for a few months now and it works GREAT! I here nothing at all! Also, put 3 drops of VEGGIE OIL on the back spindle part of the wheel. It will be very quiet. Do not use any other types of oils.
Get some tissue and put a little cooking oil onto it, if you can take the bit that goes through the middle of the wheel and wipe the grease/oil all over it and place it in the middle, if not drop a little oil into the bit the middle where it spins round.



Or get a silent spinner or move him in a different room.



I hope I helped.
Hamsters are night creatures and will always be up at night. Maybe you could move the cage to another room just when you are about to go to bed.
Maybe you could not leave the hamster in your room at night!
You could oil his wheel or just buy one made not to squeak. Best wishes:)
put vasolien on the weel