You USE the stink bomb in the Detention room to chase the teacher away. Then you can enter the secret room behind the file cabinet (you need the blueprint from Nate's locker).
(see related question)
To force the teacher to go away after you get into detention.
If your talking about the stink bomb on big Nate island on poptropica then it goes in the detention room .To get in there you need to chew gum.
Big Nate island - use it in the deletion room.
You need the stink bomb and stale gum. In the school, chew the gum. Go to detention. Use the stink bomb. Click on the file cabinet.
you make a stink bomb and then you'll need the blueprints so your character knows where it leads.
you need to make a stink bomb in the science lab by mixing all of the colors. then get detention by blowing gum. and once you get inside use the stink bomb and the teacher will go away.
first you need to make a stink bomb in the science lab the blow the gum go in the room and plant it
The game will not let you waste the stink bomb, as the only place you can use it is in detention. Once you "use" the stink bomb, it stays right there in detention. You don't need another one. You can leave, get the blueprints, and come back. (Without the blueprint from Nate's locker, you cannot enter the secret room.) (see related questions)
To get the teacher to leave in detention, you have to use a stink bomb. You can make one in the science lab. Mix blue and yellow chemicals, then heat them. You can use the stink bomb when you reach the detention room for chewing gum. You will also need the blueprint from Nate's locker.
The "blueprint" in Big Nate's Locker (combination 9305 is on the comics) shows the location of the "secret room" in the school. It is in the Detention Room, behind the filing cabinet. To get there, you will need the gum and the stink bomb. Chew the gum, use the stink bomb, and go behind the filing cabinet. (see related question below)
blue and yellow
You don't need another stink bomb. Once it is used, the teacher will not return and you can come and go from the detention room.
You should have the gum you received from the Klassic Komix guy for showing him the completed comic. Now that you have the blueprint from the locker, you can go into the detention room. You will need a stink bomb from the Science Room as well (mix yellow and blue and heat them).Chew the gum, then in detention use the stink bomb. Then you can go into the secret room under the file cabinet.