Clear e liquad turns black in my dct tank?

[Trapper1]

It turns black after a couple days it starts by leaking through the bottom of the carto then a day or two later the clear liquad in the tank starts turning black it looks like poring very dark brown liquad in clear liquad each day it gets darker Im using a dct tank and carto 3.0 ohm on my pro vari with pink spot juie. This never happend before it started a couple weeks ago I have been going through carto's like crazy. I have no idea what the problem could be, any tips or suggestions would be appreciated thanks (it starts clear then gets tan then gets darker and darker it progresses)

 

[Trapper1]

I just thought maybe im over heating the carto and its making the e juice turn color idk just a thought

 

[spider362]

Same question asked here. Maybe some help there.

 

[Trapper1]

Thank you for that

Same question asked here. Maybe some help there.

 

[PEneoark]

Sorry for the necro post. I thought this was recent lol