For cotton tights:  Fill a sink with hot water.  Pour 1/3 cup of Woolite or "cold water wash" soap onto the panty part of the tights and plunge them up and down in the sink of water to get them through wet.  Let them soak for 30 min.  Rinse with cold water and wring out the water. Stretch around a metal hanger at the panty end and hang dry in the empty shower/bathtub area.

Try to clean cum out of pantyhose or tights as soon as possible with a wet rag until they can be washed so they dont stain and are hard to clean.

 Handwashing the hose makes them last longer.