There are two problems here, either the screws holding the handles have worked loose, which is easy, but you have to dismantle the inner glass door in order to reach them. Or, the brass inserts in the plastic handle have come loose. Still fairly easy as you have to do the same job as before but this time remove the handles and run a small amount of thin super glue around the inserts and let in dry before reassembling as before
Dave, December 2009