ACUSTAT MODEL X

Hello everyone

I am getting back into hifi classical after a 30 year break running a business etc. Now retired I am looking to get my old Acustat Model X electrostatic speakers working again. They started to crackle a bit at the high end and I was told they needed cleaning but I never knew how to do it so abandoned them.

They have been looked after so should work again but does anyone know how to clean the membranes? I was told it would be due to dust.

If there is anyone in England who could do it I'd be happy to pay. Alternatively I'd have a go myself being reasonably handy with a workshop available.

Does anyone have a service or maintenance manual?

Thank you

Harvey Bowden