I won't thank you for questioning my answers.
Also about safety.
Use the commercial label removing goo. At that rate, a small bottle will last years.
Since I don't know what chemicals you have at home, that information is useless. However, more interesting would be the type of labels that you're dealing with. You seem to be having far too much trouble for it to be one of the more common types of labels.
I have some permanent labels that have some solvent mixed in with the glue. When attached to plastic or paint, they will literally solvent weld themselves to the plastic or paint, as well as to the plastic backing in the label. When I scrape those off with a razor, I usually find some damage to the underlying paint or plastic.
It won't work very well. Pretend you put a 1 molecule layer of solvent against a glued surface. Each solvent molecule will break one hydrogen bond on one molecule of glue. No problem here. However, you're diluting the solvent 1:10 with perhaps water, which has no effect. So, only one in 11 molecules of glue is disassociated. Of course, other solvent molecules can displace the water, but that take agitation, which is not possible with a thinly glued surface. More simply, the diluted mixture will work 1/10th as well as full strength.
Gasoline is a VOC (volatile organic compound). The stench is produced by simple evaporation. Gasoline volatility is measured as the Reid (absolute) Vapor Pressure is somewhere between 8 and 10 psi. It varies with season, type of gasoline, temperature, and whims of the Environmental Protection Agency.
When you mix gasoline with something that has a much lower vapor pressure, such as water which is 0.95 psi at 100F, the vapor pressure remains that of the most volatile component, but with a reduced evaporation rate due a reduction in surface exposure. A bucket of
10:1 gasoline water mix, will have 10 times as many water molecules as gasoline molecules exposed on the surface of the bucket. Therefore, assuming perfect mixing, a really bad assumption as gasoline floats on water, the rate of gasoline evaporation will be 1/11th the rate of a bucket full of 100% gasoline. The room in which you store the bucket of gasoline will have the same amount of smelly gasoline molecules in both cases at equilibrium, but the 10:1 mix might take about 10 times as long to smell up the room.Use the commercial label remover and be done with the chemistry lessons.