Use a new plain mug. The image off the printed one may ghost if it gets above a certain temperature...basically the sublimation process will start again.
I did see an Xpres press on eBay...do you know how old this one is you're after? My reason for asking is that the build quality changed a while back. I'm not 100% sure but I believe manufacture was moved to the far east. The newer ones are still very good but I prefer the older presses personally (having had both) as the build quality just appears to be a little better. You may or may not know, Adkins are a Leicestershire based company, I'm not sure if the older presses were made there.
These presses are a good investment as they seem to be holding there price very well at the moment
