A partial blockage is your toilet’s way of sending a warning signal. Handle it correctly, and you’ll save yourself a messy, overflowing disaster.

You flush, and instead of that satisfying swoosh, the water rises to the brim... then slowly, agonizingly trickles down. The toilet isn't fully clogged (yet), but it’s clearly struggling.

Don’t Flush Twice! How to Fix a Partially Blocked Toilet (Before It Becomes a Disaster)