Look down into the bowl and drain it fully so you can see into the trap.

Start by turning off the water supply at the shutoff valve and flush to drain as much water as possible from the bowl. If water remains, bail it out with a small cup or use a shop vacuum set to liquid mode and a hose wrapped in a towel to prevent scratching porcelain. Use a compact handheld flashlight and a small round pocket mirror held at a shallow angle to bounce light up into the trap bend, moving the mirror slowly to scan the full curvature for hair, mineral buildup, or small objects. For tactile inspection, straighten a wire coat hanger into a smooth shaft and cover the end with a rag or foam to avoid scratching glaze, then gently probe the trap while feeling for resistance; do not force anything or you risk pushing an obstruction deeper. If you locate soft material such as toilet paper or hair, hook or pull it out slowly and retest by pouring a bucket of water to simulate a flush; if you find a hard object do not attempt aggressive extraction and instead note its approximate position for professional removal. After clearing, restore the water, run a couple of test flushes, and watch for slow refill or gurgling that could indicate a venting issue or a deeper blockage requiring auger or professional service.

The three most common mistakes are forcing tools and damaging the porcelain or trap, failing to fully drain the bowl before inserting anything, and ignoring signs that the problem is beyond the trap. Forcing tools can chip the rim or crack glaze so always pad metal tools and use gentle probing motion instead of brute force. Not draining the bowl leaves you working blind and increases spills so shut off the supply and remove water first. Ignoring persistent slow flush after a local clear can mean a blockage farther down the drain or a vent problem, so escalate to a closet auger or call a professional if a hand probe does not restore normal flow.

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