Pull the clothes out, scrap as much of the crystals out as possible (put your hand in a plastic bad & use it as a glove), run an empty short wash cycle to get the rest out, hang the clothes on the line to dry so what is caught in them falls off & rewash the clothes.
I have seriously lost count of the amount of times ive washed a pull up thats been caught in PJ's.
Thanks! Firstly it makes me feel better that I'm not the first one that this has happened to! Secondly, I'm glad you have the experience of how to deal with it!
I'll update by tomorrow night when hopefully I'll have a load of dry clothes without stuff on them!