Jala net is great but will help your case sort of indirectly. Latex and other chemical allergies will sometimes point to weakness in the liver and/or immune system. So do everything you can to build up your immune system - healthy clean food, vitamins, exercise, meditation, clean living basically. If you do begin jala neti (a practice i highly recommend), you might consider getting a stainless steel or copper pot not a plastic one or ceramic one. And as WillPower says amaroli may be very helpful.