You’re cleaning under the sink, reach behind the pipes, and suddenly feel something unexpected—small metal balls scattered across the cabinet floor. You know you didn’t put them there, and they certainly don’t belong with cleaning supplies. While the discovery can be confusing, there’s usually a simple and harmless explanation.

In most homes, the source is a pull-out or pull-down kitchen faucet. These faucets use a flexible hose that slides in and out for easier cleaning. To help the hose retract smoothly after use, manufacturers attach a counterweight inside the cabinet. That weight is often filled with small metal beads or steel shot, which provide the necessary balance.

Over time, normal wear and tear can take its toll. Repeated pulling, moisture, and age may cause the plastic or rubber casing around the weight to crack. When that happens, the tiny metal balls spill out and settle at the bottom of the cabinet, usually unnoticed until a deep clean reveals them.

A few signs can confirm this is the issue: the faucet hose no longer retracts smoothly, you spot a cracked weight attached to the hose, or the beads are silver-gray and very small. Fortunately, the fix is easy and inexpensive. Replacement faucet weights are widely available and typically cost under $15. Installation usually takes only a few minutes. Finding loose metal balls under the sink may seem mysterious, but it’s often just a hardworking faucet showing signs of age—and a quick repair can restore everything to normal.