Way to increase the voltage marks on eGo Twist

[RT88]

for reading. took an old pocket knife and lay the tip in each of the faint volt lines. slowly front back and rocking to increase the cut gently.

now i can feel the marks with my fingernail

 

[Kent C]

why do you do this ?

The hash marks are hard to see and OP says: "now i can feel the marks with my fingernail"

 

[Disk4mat]

I took some red fingernail polish and carefuly painted the grooves. Let it sit for a few minutes to get tacky then gently wiped the cap remiving any nailpolish that wasnt in the groves. Much easier to see the lines now.