Sticky silicone bakeware usually has a thin film of cooking oil that ordinary rinsing has not removed.
Because silicone can hold oily residue at its surface, the answer is concentrated degreasing and gentle friction, not sharp tools or aggressive scouring.
Read the care label before cleaning. Let the mold cool completely, then inspect it for tears, deep scratches, or crumbling edges. Replace damaged bakeware rather than trying to restore it.
Fill a basin with hot tap water and add enough dishwashing liquid to make a concentrated solution. Submerge the mold for 15 minutes. While it is still warm, wash both sides and work carefully around rims, corners, and patterned cavities.
Use only a soft sponge or cloth. Metal pads and abrasive scrubbers can roughen the surface and make future cleaning harder.
Rinse and feel the dry surface. If isolated sticky areas remain and the care instructions allow baking soda, mix 2 tablespoons with about 1 tablespoon of water. Spread the soft paste over those areas for 10 minutes, rub gently with a cloth, then rinse thoroughly.
Dry the mold with a lint-free towel and let it air-dry fully. Press a plain paper towel against the surface. An oily mark means another hot, soapy wash is needed. A naturally flexible silicone surface should not be confused with transferable grease.
Avoid aerosol cooking sprays and unnecessary greasing unless the recipe or manufacturer requires it. Wash the mold soon after use, including the underside, then dry it before storage.
Hot water, a grease-cutting detergent, and a soft cloth remove most sticky films safely. Escalate gently and always let the manufacturer’s care instructions take priority.