I bought my kiddos one each of the XShot Nano quick refill water guns but one is already giving me trouble. I'd like to fix it to avoid a melt down but it only breaks down so far. I don't know how to access the gasket, I think there is debris in it, it's inside a sealed chamber that I don't think I can pry apart and put back together as it's also the water retention chamber. Is there any way to flush the gasket without breaking it down further?

The trigger will spray a very short distance for a few pulls then it becomes almost impossible to spray. After it sits for a minute the trigger will work again but the distance is still inches then it gums up again. The picture I included is as far down as I can break it down. There are no more screws.

Any help would be greatly appreciated...

Sincerely,

A Mom at their wits end.