Have you confirmed if your hotend is actually blocked?
If you don’t know if your hotend is blocked, lets start from square one.
First we need to find out where the problem lies – extruder or hotend.
1)Preheat your hotend to 200 deg C
3)Cut any filament flush with both bowden tubes
4)Use the LCD to extrude say 100mm of filament, given the mixing nature of your hotend, 50mm should come out of each bowden tube – Does this occur?