Hmmm I haven't performed this in ages.
I wonder whether there are very small (but noticeable) tolerances when it comes to can manufacturing. The reason I ask is that I remember doing this a while ago (I can't for the life in me remember what can it was, but I know it wasn't a coke can

), and for the first few perfomances it worked ok.
Then one time, I remember having the same problem that you're now having and wondering whether the design/shape/size or whatever had been altered. I stayed away from that can and tried something else instead. Then outta the blue (I dunno why - I was prob at a party or something

) I remember picking an empty can up (the brand that I used to use

) and experimenting with it and lo and behold everything seemed fine again lol
I dunno - maybe there are different batches. Maybe it depends which factory they were made in - all I know is that I've def had different size cans of the same brand. Many questions remain unanswered, 'cos to this day, I've no idea why I had the problems that you're now having
