You can buy depilatory that is made for intimate areas but you still can’t put it on the vagina or the butthole. It burns.
I am so sorry, you are going to be miserable for a few days. Lotions and balms are probably going to make it sting even worse.
I work for a digital display company, and it is definitely redundancy. There will be at least two redundant display systems that go to the modules separately so they can switch between them to solve issues. If a component fails on one side they just switch to the other.