Anyone else having problems with the lansinoh teats ? My 15 week old was sucking and making the size 2 teats collapse so moved upto size 3 but he will suck and I think his getting some but when I take him off to burp it hasn't moved and had like 10ml ?! The next size they recommend from 6 months so not sure what to do? Anyone else had this issue ?
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Have a look at them. I’ve had issues when the test was slit and baby was getting too much. Other time when I collapsed, the vent bit was sealed, error from manufacturer. Double check and see.

Yep theyre an absolute nightmare. I found if the lids are screwed on too tightly the teat collapses. Also double check the vent on the inside of the rim isnt blocked or stuck together. Theyre very annoying!