Originally Posted by Ra005e

I don't have this problem myself and I use cheap blades but I also don't often drive in the rain for long periods of time.
I would try either getting a diff. brand or buying the whole assembly instead of just the blade refills (if that's what you're doing) and maybe that will help.

If not, when you notice the skipping, what speed are they on?

If they aren't on the fastest setting you could try that to see if it clears up - it may be counterintuitive to go to a higher speed if the motor seems to be getting tired but it may help and better to have to replace the motor sooner than get in an accident

P.S. - I've always bought the whole assembly together instead of the refills myself just fyi, where I get them it's normally the same price or damn close to it.