I've seen people on here that say zamac heads only last about 8 years but im waiting on my birthday razor which is an 1964 tech which I believe has a zamac top cap. Could this be down to how often it was used or how well it was cared for. I clean my razors thoroughly after each shave but im now wondering should I just shave with my tech on special occasions or would it be ok to use more often. Any help would be much appreciated as I'm new to wet shaving and don't have a clue whats the best for my razor. Thanks in advance for anyone who can help me