First off, it may take more than a month to see gain. Simple as that. Additionally, it depends on what you’ve been doing and how long.
My basic advice is take 2 months off, with no PE of any kind if you have seen no gains in a year. Then start again and give it 6 weeks. Often when we see no gains we ramp up and actually force the penis to toughen before giving gains. So I’m unsure exactly what to say in your case other than to start fresh and give it more than a month.
Do you think sex and masturbation would be counterproductive to the decon?