I Got A Big Deep Cut On My Arm 2

I got a big deep cut on my arm 2 days ago, i was intoxicated and left it over night. Yesterday when i got home in the morning i immediately put a bandaid over the cut and have left it now for 2 days. I havent taken the bandaid off because i dont know if it should air out or stay covered, but i didnt clean it or anything just got rid of the blood and put on the bandaid, shall i leave the bandaid on?