I have ordered a whistle drip tip really just to replace the round tips on my cartomizers. But for tasting, exactly HOW do you do it without mixing up the tastes that are dripped on the atty? Do you have to blow out the atty each time you change flavors? Surely not ...... Currently for tasting, I drip 2 drops on my 808 and use an empty (no filler) cart to taste. But should I then be blowing out the atty every time I switch to a new flavor?