Newbie mining rate question.

[Azurestrix]

Hy, so i started mining with NiceHash miner. (CPU/GPU)
I noticed that over time the amount of gains (ergo rate) decreased and still in that tendency.
I started with 2.5 GPB on my laptop and 5.5 GBP on my desktop.
Its 0.30 on my laptop now and 1 on the other.
Anybody could enlighten me that whats happening there? Thank you in advance.

[Amph]

if you are talking about the amount of coins you get, that is probably due to the diff that is increasing

it would be useful to know what are you mining, but i suspect that you are wasting time and electricity with your little miner...