Do u change ur bath shampoo or hair shampoo. I kena once before when I change a new brand bath shampoo.

Could it be, condo water storage tank contaminated. Read a lot story about this.

I suggest u buy drinking water by boxes, get the cheap brand. And try with filter and without. Or use the same filter on other water sources. Like friends or relatives.

Yes it will kill bacteria, but if some rat or cat drown in the tank?