Potomac Hall residents looking to wash their Halloween costumes were met with a mess in a laundry room on Sunday.

University spokesman Kurtis Hiatt said a clogged drain in a laundry room in Potomac Hall took hours to fix because staff had to perform multiple “rounds of work” on the pipes.

“Staff members worked throughout Sunday to fix several issues in a laundry room in Potomac Hall related to clogged drain pipes,” he said. “Given this repair took several hours to complete, we apologize for the inconvenience this has caused, and for the delay in cleaning the debris, which was due to the need to complete several rounds of work on the clogged pipes.”

A photograph of the sludge attracted more than 300 “likes” in the Facebook group GW Overheard.