Remove any manky or diseased leaves, and i think some people cut them back, others leave them. Then just keep somewhere frost free and with some air movement so they dont get mildew, keep on the dry side, watering very occasionally on the soil, not the leaves. The wet and cold will finish them off. Assume work room is heated?

They'll need a fair amount of light, too, to stay healthy. I'd keep them in front of the window, or give them artificial light.

Have you got a kitchen windowsill? You could pot a couple up and keep them goimg in there. They flower on and on!

If the workshop is cold, keep them quite dry. It's the wet and cold that gets them. Or try taking cuttings to root in water indoors.

Thanks everyone im going to do a "bit of everything" try the cuttings ,windowsills and the work room which is kept quite cool unfortunately!