DS able to wiggle shoulders out of cybex sirona

[thearty1]

Hi,

we have a cybex sirona and my 2 yr old DS is able to remove the straps from his shoulders, and wiggle his arms out when travelling, despite me ensuring the straps are correctly and securely tightened. I don't travel him in bulky clothing or a coat either.
Has any one else had this problem and how did you solve it?

We have the same car seat and had the same issue last year with our 2 year old. We bought a Houdini Stop chest clip from Amazon. It solved the problem and now he doesn't even try so we don't bother using the Houdini Stop.