Use rubbing alcohol to stretch shoe
Take rubbing alcohol in a small amount and apply it inside the shoe on an area that is not easily noticeable. Then, allow it to fully dry. After that inspect the surface of the shoe in order to ensure that it is not damaged by the alcohol.
Prepare the solution
Get a bowl and pour in equal amounts of water and alcohol. Dilution of the alcohol in water will produce a gentle solution for the shoes. You can apply this liquid by either keeping it in the bowl or pouring it in a spray bottle.
Spray it on the shoe
Now spray this solution on the inside surface of the shoe from where you want to stretch it. If there's no spray bottle then use a cotton ball to apply this solution on the internal part of the shoe. You can apply it either to stretch a particular area of the shoe or on the over all internal part of the shoe for an overall stretch.
Wear shoes afterwards
After applying the solution, put on the shoes because it will force the material to stretch so you can have the perfect fit later. Keep the shoes on until this shoe stretching solution is completely dry.
Repeat the process if shoe is does not come fit
In case the shoe still does not get the perfect fit, you can repeat the above mentioned procedure.