Juice changed color in tank overnight

[Revoke]

So I refilled my DCT tank last night and vaped it for about 5 minutes before going to bed. Today, a few hours ago, I take out the tank and look at it and see this.

On the bottom of the tank, the juice has changed colored. Usually it looks pretty clear in the tank, but now it's an brown/orange. Is this from the old residue coming back into the tank or what? Not sure what this is and would like to find it and know if it's okay to vape.

 

[VegasVaporz]

Its completely fine to vape. All the color change is the buildup on your coil running out of the carto and into your tank. You may want to change your carto out. As far as safety, its perfectly fine. It may taste different though. Also, if its a new carto and you dont want to waist it, you can always go to youtube and search cleaning cartomizers. Pbsardo has a good video. Hope this helps, if you have any questions, feel free to pm me. Always happy to help.