Control knobs on a mechanical Toshiba oven are loose, wobbly, or do not turn the selector properly.

Safety first: Ensure the oven is off before removing knobs.

• Remove and inspect knobs: Pull the knobs straight off the shafts. Check for cracks or stripped inserts. Replace damaged knobs.
• Check selector shaft: Inspect the metal or plastic shaft for rounding or bending. If damaged, the selector switch assembly may need replacement.
• Refit knobs correctly: Align the flat or keyed side of the shaft with the knob insert and push firmly until fully seated.