gurgling?

Even if you think the tobacco is dry enough it will actually create moisture (steam) as you smoke it so just because you think it is dry enough it just might not be. Was it an aromatic tobacco?

Another thing that will cause gurgling is a poorly made and/or a poorly engineered pipe. All you need is a slight ridge or two in the stummel or in the stem or in the tenon or any sort of air restriction and that can be a spot to disrupt the air flow and cause a spot for moisture to collect and start to gurgle.

Chances are though its the tobacco or could be just a poorly made cheap pipe.

yes, it was an aromatic, and it is a cheap pipe, but never had this problem, even with my cobs. will try the pipe cleaner!

It also can be caused by operator error. Puffing to long or hard can produce a gurgle as well.
A slow cadence will allow the moisture to evaporate before collecting in the stummel. 
All tobacco has a certain level of moisture unless your smoking Bull Durham.

PS some pipers drill a wider hole in the shank, which may or may not fix it, with a cheap pipe it may be some experience for hubby. But otherwise it may take regular pipe cleaning to keep it under control.

Sasquatch over on Pipe Smokers is of the opinion that , as Poppa Smurf said, turbulence in the airway will cause condensation. I have opened the airways on a number of my factory made pipes with some improvement. I use a funneling tool (~$5 from Vermont Freehand) to open up the slot area and and the apex of the funnel.
Of course , I make my stems from rod and have all the tools. I also will heat and straighten the stem before working on it, then rebend it.
However, you can use the funneling tool on a bent if you are careful.
DocAitch

When you purchase inexpensive pipes you have to sometimes just learn to live with the imperfections that you have no clue is there. Do some home remedy fix is almost, well not exactly like but kind of sort of like trying to self diagnosis a stomach ache as an appendicitis and then trying to do an appendectomy on yourself. You can attempt to increase the draft hole in the stummel and the tenon but just maybe the tenon is to short and thusly giving you a turbulent spot from the tenon not mating with the stummel. Maybe the draft at the tenon and the stummel are off a tad and don't line up and thusly creating a turbulent spot. Maybe ... well there are many things that could/would cause your pipe to be a gurgler and trying to do home remedy fixes will probably not fix the problem and could make it even worse.

BTW do you know how to do a pipe cleaner test on a pipe before you buy it?

Typically for bents. Run a pipe cleaner down the stem to ensure it makes it all the way to the bowl without getting caught up on anything. Relevant with a straight pipe also though, as it can give you an idea if there are any of those ridges or bumps in places unseen.

How you hold your pipe during puffing of a churchwarden can matter. If possible, try to aim the bit toward the floor a little during smoking to drain the stummel a tad. The natural tendency is to keep your stem's bit really high and sophisticated. Ignore that. Keep the stem parallel to the floor, if not slanted towards it. Watch how your brim burns (hopefully none!) while doing this and pack your bowls so they or your lighting don't burn it.

If outside or acceptable place, you can put your thumb over the bowl and flick the stem to clear the moisture, but not hard with a churchwarden, if at all. That works best on canadians, lovats, lumberjacks, etc. Not sure I can tell you to do that with yours, just sharing the technique. In fact, keep it for the shorter pipes. Here's a warning too...this creates projectile spittle at high velocity. Don't put an eye out with your germ bombs.