Hi Wakeman and welcome to GoY. 'The best way of treating Christmas cactus'.... so they do what? Keep growing, flowering? Please could you amplify your question in the comments box below.

After flowering do I keep in a cold place and do I keep feeding them,just a general way of looking after them,thankyou.

Thankyou,for your reply,much appreciated.

Keep in a cool room for the next month, water sparingly, don't feed at all. Our two are back in the front porch were the temperature will drop down to 5˚ if it is cold (we've got a wee greenhouse heater in there). As they are cacti they need periods of dryness to get on and flower again. With luck you'll see more flowers around Easter time.

Thankyou for my anser Moon Grower much appreciated,Wakeham.