Best detergent for bras?

[ChickenVindlaoo]

Hello,

They are just M&S bras but I'd like to keep them in good nick for a while.

Should I be using delicates wool/cashmere type detergent. Or is non-bio ok? Or should it be bio? Does liquid/powder matter? Does it matter what colour the bra is? Nude/white/black/pink?

Thanks!!!

I just put them in with my normal wash but put them in a net bag to stop wires from escaping

Thanks Pixie!! You are my laundry guru!

(I have mesh bags from lakeland )