My garden cushions have gone green!

[AintNobodyHereButUsChickens]

How can I get it off? I usually give the cushions a good scrub and a wash sometime during autumn and then pop them all in the loft. But I just didn't get round to it last year, now all the cushions are really green and it won't come off with my usual scrubbing method. What can I do?

They're all like this

Do you have a jet washer

No we don't.

Anyone?

Take the covers off and put them in the washing machine?

They should be washable in the washing machine on a cold wash with a special detergent that protects the water-proof layer (not sure what it's called but we use it to wash our ski stuff as well)

Scrub it with some milton.

I yhink its algae.

Now I googled it looks like mildew

Dettol mould and mildew would probably sort that out. Its in a green spray bottle.

The labels say not to wash them, although I've done them on a cool wash if they've got particularly muddy from the dog. However, the washer hasn't touched this green stuff/mildew. I also scrubbed with Milton and that's not done anything either maybe I'll have to soak them in the bath or something