Problems with following up crack kick

I was practicing vs a dummy on random block so I could do Crack kick > MK RK on reaction and I’m getting pretty consistent at it, however I can’t make it work on Blanka, the RK always whiffs. Is the timing different or does it not work with him? If that’s the case what’s the best thing to do there

I usually go with reset

So is that a problem with Blanka where you can’t follow it up?

i dont think it works on blanka to be honest, but you can use ex criminal upper if your looking for damage, also f-mp works well but usually works better when your in the corner