Sorry for this guys, another MF washing question. Having read the Bettercarcare article on MF's it threw up a contradiction.
Having read that, I then looked in a brochure from AG in Australia who recomend the following for MF care,
Hot or cold, or is the 60-90 degrees considered warm

MAINTAINING MICROFIBER
I’ve read a lot of tips on how to clean and care for microfiber. It’s really very simple.
The best general purpose cleaner is a liquid detergent. It’s better to use too little than too much. Liquid is recommended over powder because some powders do not completely dissolve and the granules will lodge in the toweling.
Wash in cold water only. Warm water can be tolerated, but hot water cannot. Polyester and polyamide both shrink in hot water. If you wash in hot water the fibers will shrink and the towel will not perform as intended.
Having read that, I then looked in a brochure from AG in Australia who recomend the following for MF care,
The dirt in the cloth or towel is trapped in the weave until they are washed. Machine wash regularly between 60 - 90 degrees. The heat is essential as it opens the fibres and unlocks the dirt. Do this when required or whenever the cloth or towel looks soiled
Hot or cold, or is the 60-90 degrees considered warm


