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Regularly clean the blades, check for loose screws, and lubricate moving parts to prevent noise and wear.

A small wobble isn’t worrisome, especially when you’re using your fan at top speed, but a significant one is. Ball joint fans, which are used on sloped ceilings, are more likely to wobble than a standard fan based on their design. But even then, you shouldn’t see significant wobbling, as this can be a sign of a bad installation.

You can easily clean an electric fan by wiping it with a damp cloth, all-purpose cleaner, or mild detergent. Ensure the fan is not plugged in or turned on while you’re cleaning it. Also, try to keep liquids out of the motor, which can lead to damage.

Your bathroom exhaust fan shouldn't be loud. However, bath fans come in a wide variety of models, price points, and loudness characteristics, and yours may be louder or quieter than others you notice. Economy models tend to be the noisiest, with levels of 4.0 sones or more, which is about the sound of an electric shaver, while some high-end models can be barely audible.