Spraying deo in burglar's eyes?

I was thinking if a burglar invaded, I heard all that 'your life is more important than your property' crap, but what if he's got a gun and he's a maniac prepared to shoot anyone and anything? I thought, i get a pocket knife and my deo. Then I scream that I've called the police. At which point he'll probably come in and try to silence me,so i stand next to the door so that when he opens it he can't see me, stretch my arm out and spray deo wildly, trying to get his eyes. if he comes in, i have the pocket-knife corkscrew ready in between my fists and i drill it into his throat. Good idea? I don't have a gun and can't get pepper spray, o yeh, i also thought about using the fire extinguisher on him. Thanx guys, any other tips?