The Infinity:One is tough enough to take outside, and made for kids - so it's bound to pick up a bit of dirt every now and then!
Fortunately cleaning your Infinity:One is simple.
To clean your Infinity:One:
Dampen a cloth
Add one or two drops of ordinary hand soap to the cloth
Use the damp cloth to gently rub the affected area until clean
Do not use acetone, as acetone melts most plastics.