so true

i can beat 10/20 first try, here's the strategy:

1. start and check both vents (put on your mask for a few seconds if you see anything)
2. flash the hallway to see if foxy is there (deal with him if he is there)
3. open the camera and rewind the music box (not even to full but mostly)
4. IMPORTANT the SECOND you put the camera down, put on the mask because it is a 99% chance an withered animatronic is there.
5. repeat

also, if you see anything in the hall besides foxy, ignore it, it's just there to distract you. hope this helped.