I am completely new to this forum, also I am new to playing percussion. I recently bought a set of Meinl Headliner Bongos (pictured below), I played them for a bit when they first arrived and loosened up the heads after playing to lengthen the life-span. Now I can't seem to get them in tune, either my ears are playing tricks on me or I'm tuning them too high/low.

I've been told that 2 octaves above middle C is standard for bongos, but even after getting to a point where there's heavy resistance on the lugs, the tuner only detects a C4 (i'm still not quite there with detecting notes).

Any help is appreciated! Thanks.