i brought a tomme tippee steam sterilise from tesco in september 2010 for my son who was born on the 11th november 2010, when he was about 6-8 weeks old he started getting a bad belly and diahrea, i put it down to him teething but about 2 wks ago i noticed the steriliser wasnt working properly, when i mentioned it to my health visitor we both agreed that could be the reason he has had such a bad belly, because i stoppped using when i noticed it wasnt working and hes belly and secretions were normal again. i have since taken the product back to tesco who tested it and confirmed it was not working properly and exchanged it for another. i have written proof from tesco confirming it wasnt working properly.