Minor chips on wineglasses can be eliminated but only by reduction of the glass; so this practice is restricted to glasses of comparatively low value. Chips on important period glasses can normally be filled with a colourless resin which renders the damage inconspicuous. Again, professional help is required via a specialist dealer.
As to washing: virtually all glass should be washed in water as hot as the hand will stand with the addition of a little detergent such as Fairy Liquid. Rinse in water of the same temperature and dry with lint-free cotton cloth (such as cotton sheeting) while the glass is hot. The heat of the glass will do most of the drying.