As long as your close to 99F which you are hovering around at 37C, I think it would be good enough. I always worry about going to high. If you think you can touch it a little closer, it doesn't hurt to try but I think you would be ok. They will still hatch. You're at the end of the...
If both your thermometers are leaning toward 36 I think it would be safe to up it but just go super slow. I had an incubator that was super touchy once and it would really jump the temp with the slightest adjustment.