Grease stains on silk ties
Simply sprinkle Penaten Baby Powder (or other fine powders) loosely but generously, press lightly with your finger, let it soak overnight, vacuum next morning with a vacuum cleaner - do not brush off.
Hold the coffee filter between the nozzle and the necktie so that the delicate silk is not sucked in.
Goes with almost all substances, but you have to wait for a fat / water mixture until the water has evaporated! Then give up powder first.
Expensive silk ties never get over a cleanse - here it stays as it was and no solvents like K2R.