Here is what I do with my bath mate for optimal penile gains. 

I typically will do a session EOD in the shower for 25-30 minutes. Yes it takes alot of time and yes it  is not the most convenient but I have found this to be the most optimal protocol. I also pair this protocol with recovery peptides which I think allows me to do it more often and still recover all right.

On the same night I do the session I will typically pin 300mcg of BPC-157, 500mcg of TB-500, and 4 IU of GH. These promote angiogenesis and will allow for you to yield better results. I have also considered using a topical BPC-157 with the DHT cream yet I have not

After the session I will then apply a DHT cream directly to my penis, and go to sleep.

There is many other things you can do for PE but this is a peptide/bathmate protocol that is pretty novel that I find to be effective.