[header] How to remove a glass from a garbage disposal [title] Disconnect your garbage disposal appliance from the main power source. [step] This is to ensure it's not switched on by accident while you're removing the glass, which could result in serious injuries. [substeps] If you can see its connection to the power outlet, simply unplug the power chord. 
Otherwise, break the power connection at the fuse box or circuit breaker. [title] Remove any large pieces of glass with a pair of pliers.