I wonder why the heating of my hotend is so slow.
Is there a way to accelerate it?
Sadly there is no way to accelerate the heating time of the hot ends.
But when you say they take a lot of time could you be a bit more specific? Like to heat up to 200 degrees they take what 10 - 20 - 30 minutes?
Could you remove the heat cartridge from the hot ends ( the cilindrical tube with the red wires) and see if they are damaged or burnt in any way? It could be that the heat cartridges have to be replaced.
Let me know what you find.