Help top surface squiggle lines and blobs

[huggibunni 0]

Hello, please can someone help me. I am using cura for my ender 3 pro. My nozzle is 0.4 so i use that as my layer width, i been looking at youtube and trying to figure out the problem but i still dont know what my problem is. 
 

basically, my print prints really smoothly with a 0.12 layer height and 0.12 layer width and 0.4 . 
 

but when it prints up to the top it starts to create a squiggle line. I do not know why. Please can someone help me solve my problem. I did alot of experiments and i still don’t have the solution. 

 

Edited October 13, 2020 by huggibunni