Home when does weed vape clear when does weed vape clear by Prof. Kallie Littel Jr. Published 3 years ago Updated 2 years ago . For first-time smokers/vapers, cannabis is detectable for around 3 days in the urine. . For regular/weekly smokers, the detection window is around a week. Popular Posts: 1. what makes my vape take burnt or metallicy 2. what equipment do i need to vape 3. how do the bottoms of vape pens work 4. how to use an evolab vape pen 5. what flavorings are safe to vape? 6. what welding wire can you vape 7. how to submit vape products to fda 8. what happens if you smoke a burnt vape 9. how do you check the resistance on vape coil 10. how to reconnect wires in vape pen