Hey guys, im running a robo3d r1 plus with and e3dv6 hotend and dual cooling fans.
so i was printing some parts and then some started coming out worse and looking like this i have tried multiple solutions like cleaning and oiling all the rods, changing my nozzle, adn using another slicer but have had no improvment, if anyone knows what the problem is and can help that would be awesome, thanks.

https://gyazo.com/07524221e389aab7d325b43f60ec2a3a
https://gyazo.com/0dcb716ed9245a847a14a872bbba8e90
https://gyazo.com/49c6d2b9f5da94e2133cc619d5f8f131