Inappropriate urination is almost always due to a urinary tract infection or blockage. Please take Lazaro to the vet ASAP so he can be tested for this. Make sure you tell the vet what is going on so that the vet will do a urinalysis (a typical vet check will not detect urinary tract problems). If the urinalysis comes back clean, let us know and we will give you suggestions on how to modify his behavior. BUT, you must take him to the vet first.
Just to let you know, almost every single person we tell to take the cat to the vet for inappropriate urination will argue with us that they know the cat is healthy and that the cat is doing this on purpose. In almost every single case, once we finally convince them to go to the vet (and sometimes we simply can't get them to listen...sigh!) the vet finds signs of infection or crystals in the urine which are causing the problem. So, please do take your cat to the vet right away.
Let us know what the vet finds.