I also noticed hypodermic needles on a desk along with an immense amount of garbage spread throughout the house. 

Leave them in the fridge until the night before garbage day and then double bag them and toss them in the trash. 

That's also the reality, arguably 50% of agents are just worthless garbage.

DELETE! 

My experience was the tenants who were afraid they'd have to move were obviously sabotaging showings, leaving toilets unflushed, food in the sink, garbage can overflowing, etc., although for all I know, they really live like that and that's the reason the owner wants to sell in the first place.

NEW TENANT GIFTSHere's what we give new tenants.....Cleaning Bucket with Cleaning Supplies:white vinegar, baking soda, awesome degreaser, disinfectant wipes, carpet spot cleaner, magic eraser, all purpose cleaner, scrub sponge.Tote Bag with Useful Items and Tools:hand soap, paper towels, plastic garbage bags, toilet paper, toilet plunger, Zip-It (strip for clearing hair clogs from drains), plastic clothes hangers (6), shower curtain liner (good quality cloth one), laundry detergent, dish soap/dish detergent, cutting board, "Freeze the Grease, Save the Drain" kit, “Recycle” bag for collecting materials for recyling, magnet with our name and contact information, picture hangers.Refreshments In the Fridge (for move-in day): several bottles of water, healthy snacks, bottle of sparking cider with a welcome note attached.Larger items: Welcome mat, shoe tray.

I ask guests to take out their trash before they leave, and run the dishwasher, so there are no dirty dishes, food or garbage left out.

I ended up with a true landlording experience...including, section 8 inherited tenant, not paying her portion, 4 kids, doesn't pay bills, no phone, gets garbage pickup turned of by not paying...puts garbage in shed until code enforcement finds it.

So I paid $7,000 and then $8,000 for two garbage programs, one that folded three weeks in stealing my money and removing all their content from online, the other was just a hoax. $15,000 down the drain that could have been used towards the down payment on another property.

Yards cut, no parking on the grass, no garbage piled up everywhere.