UTG L96 question

So have had my UTG L96 for about 8 months now. It has had no upgrades and I have only used it ine one short game, so will having it just sit there lower its performance? I used it the other day at my friends party and party and they were saying they barely felt the hit at what used to be its optimum range.

It can collect dust. I'd recommend cleaning the barrel. Put a little lube on your cleaning rod until you pull the cleaning rod out and its clean