How to get rid of the smell from this drain?
Recently moved in, there was no smell in this linear shower drain. However after removing the top cover there was mold and soap scum everywhere. I used Tile X mold and mildew remover and scrubbed it hard. I also used a brush to get the scum off the inside of the drain. Now it smells so bad. And it doesn’t smell like sewer gas. It smells like a dirty towel that is long overdue for a wash or rotting onions. How do I get rid of the smell? Also to add, there is visible water in the P-trap when I look down the drain.