WADA pre-announce list additions each September to take effect from the following January. All sportsmen and women should be checking that list including looking at alternative names for each of their drugs. This is the same drug that Aregawi and some other Ethiopian runners have been busted for. Aregawi just said she don't know how it got into her. I'd put her response in the same category as Sharapova's myself.
I'd love to hear an update from Sharapova as presumably she now has an urgent need for a replacement angina/dodgy ECG drug, right?
A good Polar strap propertly wetted under the cold water tap works fine straight out the door. The only time I get problems are if its very cold and windy and it dries out or I bend down (say to tie shoelaces, so always put trainers on first). Don't wait for it to work off sweat.