Relays like that (and most others for a very long time!!) are fully sealed and can't be opened/cleaned, and so they have to be replaced, which shouldn't be difficult as there are probably only 4 or 6 pins on each one pushed through the PCB and soldered to the other side -> unsolder pins & pull out old relays, clean up the holes in the PCB and then fit & solder new relays. Probably about 10-15 mins maximum!So they're soldered on board ? Not cleanable ?
yes, and then chucking all the bits in the bin in a fit of rage! LOLSame as me, inevitably I end up burning the motherboard.