ive been boiling hayes pads now for years, they ALWAYS come up good as new, if u have only accidentally spilt a drop or two of something on em , theyll be fine if u boil them , if they have been dunked in something chuck em, theyll neva be very good again.
i just put em in a saucepan, leave em boil for about 3-4 mins, and that should do it, take em out and wipe them with tissues