How long does holy water remain holy?

What processes deconsecrate it?

If I dilute it with regular water, at what purity does it cease to be holy? If I can dilute it as much as I want, could I throw some holy water into the ocean and make the entire ocean holy?

If I freeze the water, does it become holy ice? Would a sharp shard of holy ice be a good alternative to a wooden stake for dealing with vampires?

If I boil the holy water, does it become holy steam? Can I create a gas chamber for dispatching vampires? Do they boil holy water to sterilize it before baptising babies with weak immune systems?

If I condense holy steam or melt holy ice, does it become holy water again?

If I drink nothing but holy water for a few days, will I excrete holy urine? If holy urine is purified through some kind of distillation, does the resulting water fully retain its holy properties?

Are there other processes I'm not thinking about that could cause water to lose its holiness?

I realize this is a lot of questions. Many of them probably don't have serious answers, but this isn't a joke question. I'm genuinely interested in what the limits are for holy water. I figure some of these issues must have been seriously considered by the Catholic Church at some point in history and there may be canonical official answers to some of them, which I'd be fascinated to hear about!