Diagnosis
Accumulation of toothpaste, dust, and moisture in the non-submersible charging base.
How to Fix It
1. Unplug the base. 2. Use a dry, soft-bristled toothbrush (not your Hum brush) to dislodge dry debris. 3. Dampen a cotton swab with isopropyl alcohol (70% or higher). 4. Carefully scrub the grooves and the two metal charging pins. 5. Use a dry swab to absorb any residual moisture. Ensure it is completely dry before plugging in.
If That Didn't Work
For hardened deposits, use a wooden toothpick to gently scrape the grooves, followed by the alcohol swab cleaning. Do not use metal tools.
Heads Up
Never submerge the charging base in water or run it under a tap. The electronics are not sealed. Only clean when unplugged.