Hi All

I mainly use S9/i's due to price and replacement of hash boards being relatively cheap.

I have had some i put in a pile to sell as they do not work or bring a whole S9 down (constant restarting etc), BUT then i have gone to use them weeks or months later and they are fine??

The ONLY thing i have done is cleaned them with a stiff  brush and them blasted them with contact cleaner.

I'm wondering if anyone has had any success with using an Ultrasonic Cleaner and the relevant fluid?

This 6.5l seems to accommodate a whole hash board plus i suspect the fluid would last a long time if you clean the boards as i explained above.

https://www.ebay.co.uk/itm/154339501013?hash=item23ef59e3d5:g:lHQAAOSwQUFgMgJm

Anyone got any views/opinions on this?

Thanks