Why do my ejective sounds (ቀ, ጠ, ጨ) sound so weak to native speakers?

I’ve been recording myself daily to nail the Amharic ejective consonants, but my tutor keeps saying I’m missing the glottalic tension. I’m currently using Chickytutor.com to analyze my recordings, but I'm struggling to bridge the gap between knowing how the mouth should move and actually producing the sound naturally in connected speech. Does anyone have specific tongue-positioning tips for these fidels?