My Carpet Needs Saved, Send Help

Anyone out there Able to give me advice on cleaning carpets?

To preface my issues im having:

My 3 yr old daughter is Autistic and has a oral stim problem of spitting liquids onto the floor or into other vessels, which inevitably ends up on the floor.

Her favorite thing to do this with: Pedisures

Anyone able to help me figure out how to get the build up from all these pedisures out of her carpet? Its gotten to the point where im finding clumps of carpet thats no longer soft and its just an amalgamation of crude. ​