Definitely.
Once it starts tasting consistently burnt, at the price they're at just chuck it and replace.
Or if you're using a VV mod, dial down the voltage. I honestly couldn't get any of my Protank heads to not burn at anything above 3.6v, so I'm back to carto tank for now.
I pay about £10 for 5 heads at 2.5ohm resistance...havent been able to find them cheaper anywhere else.
My tanks burn at 4 volts easily on my provari mini...i get a nice taste and hit at that voltage.