Umarex Walther PPQ M2

I just purchased the Umarex PPQ M2. I watched many reviews beforehand which discussed the stickiness of the pellet belt, needing lubrication, etc. Any others with insights on
helping this issue? Does it loosen up with time and shooting. It's not terrible, but once in a while I have to remove the clip, then re-insert to get it moving again. I have lubed the belt with silicone. Any advice would be great.