The angles are tasked with cleansing, not us.
"Again, the kingdom of heaven is like unto a net that was cast into the sea, and gathered of every kind, which, when it was full, they drew to shore, and sat down, and gathered the good into vessels; but cast the bad away. So shall it be at the end of the world. And the world is the children of the wicked. The angels shall come forth, and sever the wicked from among the just, and shall cast them out into the world to be burned. There shall be wailing and gnashing of teeth." (Matthew 13:48-51, Inspired Version)
"The field is the world; the good seed are the children of the kingdom; but the tares are the children of the wicked. The enemy that sowed them is the devil. The harvest is the end of the world, or the destruction of the wicked. The reapers are the angels, or the messengers sent of heaven.
"As, therefore, the tares are gathered and burned in the fire, so shall it be in the end of this world, or the destruction of the wicked. For in that day, before the Son of Man shall come, he shall send forth his angels and messengers of heaven. And they shall gather out of his kingdom all things that offend, and them which do iniquity, and shall cast them out among the wicked; and there shall be wailing and gnashing of teeth. For the world shall be burned with fire. Then shall the righteous shine forth as the sun, in the kingdom of their Father. Who hath ears to hear, let him hear." (Matthew 13:37-45, Inspired Version)