Stage 3-7 of Doors and Rooms. Pick up the blue bottle near the green, blue and purple bottles (Anti-A).
On the right shelving system, pick up the note. Open the middle drawer cabinet to get another bottle (anti-D). Open the cooler box under the cabinet to get the samples. Open one of the big lower drawer to get the microscope attachment. Attach this to the microscope you see in the room. Another lower drawer (under the cooler) contains a small bottle. Anti-B for Doors and Rooms App.
Place the samples you got from the cooler into the microscope. The middle drawer under the cabinets contains another part for the microscope, find and attach this. In total, three of the drawers under the cabinets contain items.
Tap to zoom in to the microscope. You will see the samples for each of the 6 people. If you observe the paper from your inventory you will see an equation. 12, 14, 10.
On the cabinets you will see a paper with lots of red dots, not the one on the wall! Zoom in to this and use each of the 3 bottles you found on it.
The final door code is 697956. This is the final door code for the Doors and Rooms App.
Doors and Rooms chapter 4 Update with 1-11 1-12 and 2-11 2-12.
Stage 1-11. Pick up the chain, toilet roll and handbag. Dismantle the toilet roll (seriously!) to get the paper and the middle roll piece. The roll has code 217453.
Enter this code on the Toilet door key chain. Pick up the hammer. Use the hammer on the mirror to shatter it and get a glass shard from the sink.
Combine the glass shard with the padlock handbag to open it. Dismantle the handbag to get a magnet. Combine the sink plug with the magnet to make a thing. Use this thing to get the key out of the drain vent on the floor and exit the room through the door.