Well i hope it`s ok trish, 100ml is quite a bit to be chucking out

I am the same now regarding any crappy tanks, and most if not all have been binned. I never ever got on with the PT`s, even building my own coils for them they would always leak.
Yes, I'm hoping it's not the liquid - if it is though, I'll have to ask Chefs if anything has been changed recently.
When I first got a Unitank, and later a MP2, both were great, so I ordered a couple more, and then more - ended up at separate times with 6 of each, and when the first ones started leaking and spitting etc., I'd get a new one and within days, they started acting up too. Had the same with the 30S also months ago, and the MT3S just recently. I even got the Aspire K1 ..and that was terrible from the first try!
So, when the mini Nautilus and both sizes of the Mow ones were good, I've stayed with those and also a few Evods.
Used that 1ml Eleaf GS16S on and off the past two days and it seems very good so far - they're putting the correct GS16 in the post tomorrow for me.
Unusual coils in that they push in.