I was unfortunate enough to order these three 15ml spray cans which I thought would solve the problem with my jammed indoor mortice locks and key jammed in my one of my window locks and balcony door lock. I did manage to remove the jammed balcony key, but only after getting my pliers and giving the key a good yank. I believe it was brute force that solved that problem, not the graphite lubricant. And as for the mortice locks they are no different, still jammed. The only thing the lubricant done was run down the door lock and stain the glossy paint work, which luckily I managed to scrub off with bleach. It wouldn't have been so bad if I just ordered the one, but I ordered three as I thought one wouldn't be enough for all the locks and jammed keys I wanted sorted. Don't know why I bothered. I should have just got WD-40. Lesson learned!!