This is a trick: if you want your worm to fire a lot of grenades in 1 turn, I’ll tell you how it’s done. We take Icarus’ potion, but do not drink it, then turn on the weapon menu and point the cursor, for example, at a grenade and then click on the grenade pkm, lkm, pkm, lkm, and then he will fire grenades himself. ATTENTION! Don’t do it with dynamite, bombing, alien abduction, poisoned arrow, and homing missile. Then, if you want to continue your turn, take the Icarus potion again.
Personally, everything works for me!