[Freeswitch-users] proper way to clean source tree after build?

I'm building under Debian. To clean the source tree after building, I've tried make clean debuild clean but what often happens is that after updating to a later svn revision and then trying to build, I get various errors during the compilation process that disappear if I make a clean checkout from the repository and run the build again. I have also found that using svn export to reproduce the tree in another directory, then building from that directory, doesn't always solve the problem. Is there a better way to clean up the source tree after updating it, to avoid these issues? I assume there are extraneous modifications or files that simply aren't being eliminated by the "clean" makefile targets.