Y have the beige/cream innterior which is a real pain to keep clean especially with kids,whats the best way to clean the floor mats,washing machine??dry cleaners??

I've soaked genuine Lexus mats in the bath before. Others have used pressure washers.

i have put them in the washing machine before without any problems.... other option is a wet/dry vac

I have used the Rug Doctor before now which is quite good, can be hired from Homebase, although may pay to do house carpets as well as hire is for 24hrs

I use the Vanish carpet foam on mine. Spray on, brush in gently with a scrubbing brush, leave it for an hour and then vacuum away with a normal vacuum cleaner. Works quite well and is very low effort compared to some methods!