1) If you have gone through three in short order, that would tend to suggest there is something in your body chemistry that is reacting with the materials. Fact of life is that really does happen - a different example (in the other direction) are people who react adversely to latex and/or urethane. My nieces also can only where earrings with sterling silver posts due to reactions to stainless steel. On the technology front, in the past some people could not wear particular mechanical watches because they would stop working whenever they wore them. This is a long way around saying you really may want to consider a different product or wait to see if a next generation changes anything.
2) As to the person saying they "religiously used" alcohol, do people even bother to read the disclaimers? Alcohol should not be used for more reasons than the fact it breaks down rubber. It can certainly affect circuitry if there is any intrusion and (likewise) eventually impact sensor conductivity. Just because you have done something with out apparent effect does not mean you are not causing long term damage. The instructions are given for a reason and people should pay attention to them.