When my washing machine is on there’s quite a bad eggy smell that seems too come up through the sink plug holes, and it stinks! Any tips on sorting this out and stopping it from happening?
Start using calgon. For the smell and to keep it clean. It works. Look out for large packs on offer vs silly money small boxes
Put a splash of bleach down your sink plug 'ole and if possible the overflow every so often when it's bed-time, then go to bed, and resume operations in the morning as normal. Weekly should help.