Need help with closet grow

Hey guys I'm a first time grower and using a closet under my stairs, a little backround information on my plant first. It's in it's first week of flowering and looking great, using 4 23watt 2700k cfl's with a good size fan blowing on it 24/7. My problem is ventilation... I can't drill holes in the door because the landlord would probly notice in the case they had to get into the apt. And like I said its under a staircase so no going through the ceiling here either. I usually just leave the door open during the light time of the cycle with a fan blowing fresh air into the room but my cat likes to creep around in there and that's a risk I want to avoid. Its completely closed off and light proof during dark period. Seems to be ok but gets a little wilted over night... any help or ideas would be great thanks

Anyone lol? I know I'm new to the growing scene, but could use some tips to make this first grow successful. Buds are already showing and it's healthy just need some vent info??

wow 15 views and no one knows of a better way to vent my grow room? guess ill just have to keep opening up the door to get fresh air in.. thanks anyway