Sarnia
Back in the 1950's when I helped my Granny with the washing she had an old saucepan which was kept just for boiling handkerchiefs. She added a chunk of Sunlight soap to the water and let it simmer for an hour or two before rinsing.
I'm sure times have changed since those days, Notagranny44 but you have brought back a fond memory of post-war wash days.
I used to boil the hankies in a saucepan when I first got married, just as his mother had done.
I had to go away for a few days, and on my return, he happily told me that he had done the hankies, but couldn’t find the saucepan, so had done them in a casserole dish in the oven.
It’s take me over 50 years to wean him off the disgusting things and use tissues.