Flip the pen so you're writing with the nib backwards. Then gently press to re-align the tines. Then do a bunch of figure eights with the pen in the correct writing position on a brown paper lunch bag (around 5 minutes). Press down harder than how you'd normally write and see if that doesn't help.

I don't have the link any more but I believe there's a way to smoothen the nib by writing on fine graded 'smoothing paper', not sure what it's called in English, with a little bit of water. Also, I don't think soap is advisable, use filtrated water as tap water can contain minerals that might damage the nib. That's just some stuff that I remember, might not be 100% true. Maybe someone can provide a link.

Also, what paper are you using? 90g? High quality paper does make a difference.