It's begun to strike me that my old Hotpoint washing machine doesn't get collars and cuffs as clean as it did 10 years ago when it was new. Maybe it's my imagination or maybe it's just that all my shirts are old and f**ked. There are no obvious operating problems so I'm wondering if the water isn't being heated to full temp. Years ago I used to use a 40c setting with perfectly good results but lately I've started to try 50c with no great improvement. How do you measure the water temp inside the machine while it's performing a cycle? A hand on the glass door would be a rough and ready guide so I'll try that next time I do a wash just to make sure it isn't stone cold but an accurate check would be handy. Even with a thermometer on the outside of the glass I can't see one being able to get a proper reading of the temp inside.
If it isn't machine then perhaps it's time to try a different soap powder.
Dave Baker - Puma Race Engines