Can't remove effect from player

[PoetinNL]

Can somebody help me with this,
I would like to remove the effect if a player unequips the helmet.
The applying effect works, however removing it does not.
I also get no errors, Can somebody explain to me whats wrong?

(Btw, I know you can just use on equip events etc, but I like to use SKBee for it wich works fine)

on player armor change:
    if new armor item is any helmet:
        send "&a%player% equipped  a %new armor item%" to player
        if getLevel(player's helmet,"test") > 0:
            apply slowness 2 to player for 5 seconds
    if old armor item is a any helmet:
        send "&a%player% unequipped  a %old armor item%" to player
        if getLevel(player's helmet,"test") > 0:
            remove slowness from player

[doublepost=1594245704,1594241616][/doublepost]I found out why it doesn't remove the effect:

Because getLevel(player's helmet,... is air because if old armor item is a any helmet: checks if the helmet is unequiped so they won't be wearing a helmet. So I basically need to change it to getLevel(old player's helmet
Using SKbee

But that isn't a thing, So how to fix it?