How to remove thin line between image banners

[theplayfulpooch]

I have recently added an extra clickable image banner to my store. Only on the mobile version a thin grey line appears under the first banner (it doesnt show up on desktop). How do i remove this please? Its the line under 'toys treats enrichment' on the photo - Im using the Craft theme.

[Made4uo-Ribe]

Hi @theplayfulpooch 

This line is visible in your live theme? Or its on the other theme? Its not visible on my end. 

Would you mind to share the preview? Thanks!

[theplayfulpooch]

Live theme but only when i look at my website on my phone - not from shopify admin

[Made4uo-Ribe]

Sometimes, it also depends on the phone your are using. Did you try to open on the desktop/laptop? I did check on another screen on mobile even I check on my personal mobile. The lines still not visible on my end.