You mean 2018?
I give my goats a good bath before clipping. Dirty hair will dull a clipper blade really quickly. Wash the udder too!
Clip a comfortably full (and dry) udder with a 50 blade if you have it. There are probably some good YouTube videos out there.
After the clipping, put udder balm or an other mild oil or cream on the udder. The udder will be kind of dry and might even have some razor burn.
Some people use shaving cream and disposable razors after the initial clip a week or so before the show. .