Owlet for 2nd

We’re expecting our second in the fall. I loved the owlet with my first...we never had any false alarms and it worked great for us. I did have to replace the little sensor piece when my daughter was 12 months. We have the owlet 2 with 3 different sized socks. Would you buy a brand new one or continue to use the one we have (given we charge it and it works).