You say "not helping much". Does that mean "I'm not regrowing much"?
Remember, just stopping the hairloss where it currently is would still be considered a success. Hell, even slowing it by 70% would probably be a success.
Also, no, they won't lose effectiveness. I've been cutting them for 6 years and have had good success. The only POSSIBLE way would be if you're cutting a months worth of them on day one and you're in a humid environment and they're absorbing a lot of moisture.
