Doesn't thicken as expected

I've tried this machine a few times as per the instructions and have been disappointed with the results. It never seems to thicken as it should and I had to put the canister back into the freezer just to get it thick. It is also very noisy and the stirring mechanism seems a bit flimsy. So it's probably a good thing that it doesn't get too thick because it could break during the stirring process. It's a good price but next time I'll pay a little more for better quality.

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