Says it all really.
Have tried doing it with us holding the toothbrush, we let him hold the toothbrush, tried it with him sitting on my lap, tried letting him wander round with the toothbrush, tried letting him clean my teeth first (not very hygienic I know . Have tried a baby toothbrush, an adult toothbrush - but nothing! Just point blank refuses to do it to his own teeth.
Had a brief respite on holiday when he did it every morning but not at home!
He didn't get any teeth until he was 9 months old so we were quite late on starting to clean his teeth - in hindsight, it may been a good idea to start earlier (even though he had no teeth).
The only thing we haven't tried is 'baby' toothpaste as the HV said that normal toothpaste is ok so we have stuck to that.
Have let it go on for a while but I really want to get it sorted before he ruins his teeth.