How to mix Chemicals

[deazrow]

Spoiler below!

Go to incenerator make your way over the board path and through the door. In there you will find an empty glass container pick it up and turn on gas. Use lighter on the burner and set empty container on top...that is where you mix the chemicals. Also in drawer there is a fuse you will need. When you mix the right chemicals pick up container carry it back over the board pathway to the caved in rocks set it on them and use fuse with chemical and light with lighter.

Sorry, but HOW to get in incenerator room? the door is just a bit open and i dont know what to use to open it completely? pls help