Facebook Enter Button?

[Mufasa & Simba]

Im trying to post a comment to my grandparents who live in a different country but every time i press the enter button for it to send it just creates a new line and there is no other way to send it.
Is there any way to stop this because it's driving me crazy and no im not pressing shift, so that can't be a possibility, im just really confused.

Thanks For Your Time.

[Ainsley]

You can press ctrl + w or alt + f4 or if you want hold down the power button on your laptop or computer tower then restart and do a system defrag