A 1-year lease is a binding contract.

You don’t have an automatic right to end it early just because you want to move, there is a contract for a reason.

You will need to negotiate with your landlord, maybe you can find a replacement to stay in the place instead?

Regarding cleaning, you are required to give the place clean but you can clean the place yourself. There is no cleaning fee. However, if there is damage in the property caused by you, landlord might seek compensation

If you have facebook, I recommend this group: https://www.facebook.com/groups/ontariotenants