9stars 50L & 8L combo twin set autobin oval stainless steel kitchen sensor waste bin

The bin was absolutely ideal as it's compact and fits perfectly in our kitchen. However it's only lasted 6 months. The electronic sensor has gone be seen and won't open or sometimes keeps opening. Really disappointing!

I like the bin But it didn't come with any instructions with it because it should be automatic, please let me No how it posted to be automatic, please send instructions please