Blessing of the bathroom

So apparently there is a blessing that Jews are supposed to recite after using the bathroom. Our church needs to have some heavy renovations done on the restrooms. Apparently a squirrel has been getting into the building via a hole in the men's room and wreaking havoc. I also recently learned that when the bathrooms were originally installed there was some discussion as to whether they should be put in at all, after all, would you even do such a thing in God's house? Interestingly, this debate took place back when church services were much longer than they are now, and apparently when more Unitarians actually believed in God. It does seem that the Jews are more in tune on this one. If God created us, then wouldn't he know that we use the bathroom?