As an ex-smoker and daily vaper, I agree nicotine is a very addictive substance. I smoked for decades and it was beginning to make me wheeze. I did a little research and it seem that my 6mg 60 ml bottle of vape (takes about 2 weeks to finish) is a fraction of the 10mg of nicotine and another 100 or so toxic substance in a cigarette per smoke. I don’t deep lung my vape, I use it similar to a cigar. Since quitting smoking, my lungs are strong, no wheezing and I feel great. I totally understand the need to model good behavior to your young child and applaud your for that. I understand the nic fit problem. You will succeed!!