Sprite white edges

One of my bomb sprites had some unwanted white spaces surrounding the edges, so i got rid of it. It still showed up the the gameplay so i tried again, this time filling the empty space surrounding my sprite so i could find the white spaces. I cleared up a few that i missed, but there are still about fifteen spaces white surrounding my bomb, ones i knew for certain i got. link to game: http://flowlab.io/game/play/169067
I put the bomb in the front for people who want to check.

ok i fixed it; i tried to used a template from a pic off the internet, but I guess something was wrong the way i saved it, so i just drew it from memory.

redraw the bomb, hit the X and start over