Hi there, New to hot tubbing, just got a Sundance optima. Been using it for about a week and loving it, last two nights while in the tub I've noticed a soapy oily dirty ring form around it while in there with the jets on , I wipe it down and it reappeared, was wondering if anyone else has ever had this happened and if there is anything I can do to remedy the situation, thanks again for all your help!!!