That may be true....or maybe you're just a clumsy, irresponsible fuck. I wouldn't know.
I haven't really had mine slip at all, unless I'm not holding it.
I want to give you something:
. , : ; ( ) /\” ? ! ‘
They are called “punctuation”. I suggest you use them in the future. That way, you don’t look like a fucking 8 year old in an adult’s brain.