I just wanted to let you know that your product worked great on North Long Lake in Baxter, MN last week. None of us had any swimmer's itch from the two days we spent in the lake. The product has some serious staying power and certainly clears the sinuses, but it's worth it to avoid the dreadful itch. Thank you, also, for letting me know the retailers who carry Swimmer's Itch Guard up there. I will keep that handy for the future, although I am glad to see that the expiration of the jar I bought is many years away!