Just started on wet shaving week or two ago... my merkur long handle came with a merkur blade which was pretty awesome. Besides that I purchased a 100ct of 7am platinum blades for $14. My first 7am blade lasted me 3 shaves doing 2-3 passes on each shave. Might be a little too much but I am still learning what is the best way for me... along the grain, against... one along and then against.. etc. Anyways, today was my 4th shave and it was just terrible even in the first pass. Didn't cut very well and I am wary of applying any excess pressure. Is that normal life for a blade? Just trying to get an understanding here on life of the blade etc. Thanks much.