I'm a former beauty therapist so here's the Gen:
If it doesn't hurt, it's going to keep coming back.
The things that hurt do so because the hair is attached to a nerve endung at the root. Every time you remove in this way, you're weakening the hair and it will eventually soften and stop growing although this can take some time. As our hormones change (particularly if we're not in HRT) we become testosterone dominant as oestrogen levels fall and whilst we're not going to grow penises sp?, our facial hair becomes thicker, stronger and more abundant.
I use an epilator every other day, just take it over the entire lip chin area, done.
Tweezing, threading and sugaring are all good as I waxing but only in the hands of a very experienced waxer who must use a pre wax oil.
I wouldn't use creams or bleach on that area as you're risking skin damage which could lead to several long term problems.
Electrolysis is very good but takes a long time and can cause putting/scarring in some women.
Laser is also very good but only works on dark hair so if they're silver or light don't be persuaded that they can be removed - they can't.
Please don't use at home wax strips, you could cause a lot of damage.
Apparently Nono is just that!