The best way to do it is to use the toy cleaner. The toy cleaner is being sold almost in every place that vibratores are being sold. It comes usually as a spray or gel. If you don’t have the toy cleaner you can also use a mild soap to clean it but be carful, if your vibrator is not waterproof do not put it underwater. If you look for an easier way you can also put a condom on it.
What I need to know about Adult toy?

Information:

Can I use my vibrator in the shower?
How can I clean my sex toys?
Is there a vibratores for man?
Why should I use sex toys?
Do vibratores work only on batteries?