I guess it’s hard to remove until it’s removed? Either way there’s nothing to do but to do it.
As far as investigation goes I’ll point you toward this recent post by @Elgin
Investigation takes many forms but the gist is to be an interested ‘scientist,’ learn everything you can about it, its ins & outs, how it operates in you, how ‘you’ operate. And as you get to know ‘yourself’ more and more, and have more and more experiences of purity, it becomes more and more a simple choice about how you want to operate, what gets fed, when you can nip things in the bud & when something just needs to be experienced for a bit longer.
A useful idea is that ‘nothing can go wrong,’ so however you investigate has potential fruit to be found. If you’re feeling worse then you know you’re headed the wrong direction, but even feeling worse has interesting information about ‘you’ to be gleaned which can ultimately be useful as well.