Frankly, the energy needed to purify and heat the tap water that the bottles are cleaned with, added to the cost of melting the bottles down, costs more than just processing new glass. If the above statement were not true, somebody would pay you for those bottles.
New glass contains about 30% old glass, called ‘cullet’. It is cheaper to melt glass than produce it from raw materials. The chemicals that give glass color are expensive so the old glass is valued. There has always been glass available for remelting, even before the recycling crazy began n the 60’s.
Oh, washing bottles to be recycled is a waste of water. Glass melts at 2,700 F., incinerating any organic material. Metal should be removed as it causes the silica to turn to silicon beads which weaken the bottle.
Glass furnaces run 24/7/365 from the time they are fired-up untl they are torn down years later when the fire-brick that lines them gets too thin.