Yes they do, great isn't it.I hav some like this and without charge have put a strip of draft excluder on the inside of the frame, problem solved.
The residue left by the soap in trad attracts dirt. This soap residue is sticky in damp weather and so all dirt sticks.I know all trad cleaner will have a hissie fit, but its a fact of out moded work methods.O K trad chaps fire away.