The LG K20 Plus Android smartphone was released by LG Electronics in March 2017 as part of the K Series. The LG K20 Plus includes model numbers LG K20 V, LG VS501, and LG TP260.
99% isopropyl alcohol and a cheap toothbrush. If that doesn't do it then you can try using thin tweezers or a dental pick or something similar to carefully rake out the packed in lint.
6 
3 
1