Clamped today

First time ever and wasn’t exactly sure of the correct pressure. I experienced a bit of coldness on the glans with just 2 sets of 2 or so minuets. Upon feeling this I immediately removed the clamp.

Question: I’m assuming the clamp was to tight. Before the extra click I wasn’t getting that much compression then I clicked once tighter and soon after the coldness appeared. I guess there is a fine line between the amount of force extracted.

Any advice would be great. I’m 4.5 months into this