Creaking SPD shoes

ollie2376 Posts: 9
edited February 2010 in Workshop
I have just got into road biking and bought my first road bike on saturday. I have been out and about on it, but my SPD shoes are making quite a loud creaking sound. I have had them around 6 months (used them on mountain bike prior to road bike, without problem).

I checked the cleats and they are done up tight. One thing which may be effecting it is that one of the pedals cant seem to stay fully tight. After a ride you can tighten it half a turn by hand, which is obviously too loose!

Any ideas on wether these two problems are linked? If not, how can I fix either of them?