I have an Alpha 1 Gen 1 drive and I am pretty sure the water drain is plugged. I have been working a wire in it and a bunch of sand has been coming out but it still seems plugged. I am guessing that the passage goes up from the drain hole. I get in a little ways and then it stops. Some water comes out, but it is just a slow drip. Is there any way to clean this out without having to remove the lower? Can I use compressed air and blow it in or would that cause an issue? Any thoughts would be great. Thanks.