Don't know what else to do to make my DS flush the toilet and wash his hands after. If I catch him coming out of the bathroom and haven't heard the flush or tap I will remind him and he'll go and do it but I know if I'm not there he won't most of the time - there is evidence! His brother does it himself no problem. Have done the nice talk, explaining why and all the hygiene reasons, have also lost my temper at times, telling him off for it when im exhausted with the nice talk. I'm actually wondering if I need to say there will be consequences - such as no games or treats etc...does that sound harsh or the wrong approach? Don't know what else to do, plus this was a kid who had the 20 second handwashing thing drummed into him from everywhere during covid when he was 6 and I remember joking at the time with DH that we'd have no problem with our kids learning about the importance of it!