I can only make weak Saviour Schnapps'...

Title. I always just make weak Saviour Schnapps... other potions I can easily get to nornal or strong quality but I keep fucking up the schnapps??

I pregrind the Belladonna and make the pot boil by itself before i add the nettle for exactly two turns. As soon as the second turn runs out I add the belladonna... i dont know where I make a mistake.

Do dry ingredients affect the quality?