The word "clogs up" implies obstruction, blockage, or congestion. Some antonyms that are commonly used to describe clearing up or removing obstacles include unclogs, opens, frees, unblocks, facilitates, and removes. To unclog is to remove a blockage or obstruction causing stagnation or congestion. To open is to create a pathway or access through an area or place where the way is obstructed. To free is to release from bondage, captivity or imprisonment. To unblock is to remove whatever is blocking or hindering a process. To facilitate means to make things easier, simpler or more convenient. To remove is to take away from a place or position.