Is it necessary to raise humidity for shed?

[Raven01]

It seems like when people start asking questions about shedding somebody at some point suggests the humidity be raised. I personally never raise the humidity and get perfect sheds nearly all the time. So is it actually necessary to raise humidity or only for a problematic shed?

If you have ideal humidity probably not.
However, I try to have the humidity on the low side where I can to inhibit growth of nasties to make cleaning easier. Think of a poorly ventilated bathroom. Then when I see a shed coming on I bump humidity to the higher end of "normal" to give myself more leeway if it drops a bit while I;m at work.
But, to be honest I haven't tested it to see if I am just creating more steps for myself this way or not.