iPhone 6 isn't charging any more

Hello people,

i got a Problem with my iPhone 6.

A few weeks ago the message appeared while loading "Your accessory isn't supported or certified".

I got the orignial cables, the newest iOS and there is no dust or something in the charging socket.

I don't know what to do. I remove the cable about 50 times and suddenly it's loading.

Hope you guys got a solution for this problem.

Thanks,

Florian