Bathmate Hercules Usage & Pressure

Hi,

So I bought a BM Hercules few days back and started to try it out few times to learn how to use it. I use it in the shower, fill warm water till the brim then put it on. I used it mostly when I was flaccid or like 20% hard. I pumped it 4 or 5 times saw that water got flushed out mostly from the base of the pump (my groin area) very less water was coming out of the valve. Once I got decent suction and I pumped 1 or 2 times then I noticed that the water would pump out from the front valve. I’m guessing this is normal ? Now when I’m flaccid and I pump it so no more water is flushed out, I notice that there is suction but if I leave the BM and let it hang then it might fall off gradually in like 5-10 secs.. Is it supposed to be like this or is it supposed to stay stuck to me ? I tried using it when I’m erect around 50-70% and noticed suction bit stronger, if I leave the BM when I’m erect then it would stay on longer but I feel it would also fall off due to the water weight. I also don’t feel much pressure on my penis when I pump it flaccid, very slight pressure when I’m erect. So am I supposed to feel alot of pressure and suction when I use this device ? Lastly I noticed that after using it (been using it 2 days till now) in erect or flaccid state, I don’t see any difference after taking it off. I have no prior experience with PE or anything like that. Am I using this correctly ? I also understand that I need to do warm ups stretches etc. But I plan on doing that once I know I’m using the BM correctly. Really hoping someone can help out.