You must be still treasuring Nautilus Tank even though you've gotten it for a long period of time and it is a little out of good condition. Because this wonderful atomizer really is worthy all of your favor especially for its adopted BVC coil techonology patented by Aspire. This advanced coil technology makes this atomizer well-marked among so many marvelous atomizers on the market. Maybe the most worrying problem is how to lengthen its serving time. Nautilus Tank is so popular for its good taste production due to the unique BVC coil technology but actually it can not stand high wattage output, so you'll get the huge vapor production from this atomizer. The suggstion is not to power your atomizer over 15 watts. The maximum level may vary from different box mods and e-juice proportion. It is clearly known that the higher wattage output the shorter life. Another point you should keep in mind is the proportion of e-juice. The high proportion of VG in e-juice many be damagable to your atomizer and so moderately limit too high proportion of VG though the e-juice with high VG proprotion can bring huge vapor production. To well enjoy the wonderful vaping experience from Nautilus Tank, you should regularly notice the change in taste because long-time use of atomizer head without replacement will bring a decline in taste. About every 2-3 weeks you should replace your atomzier head and also you can detach and clean your device to keep it in similarly as good condition as a new one. Hope these advices are helpful for you!