According to Dewey Pest Control, crickets do not pose a health hazard and can be prevented by you  in some of the following ways

1)  The outside near the doors should be cleared of items and debris so they don't have  places to nest/hide and find their way in.
2) A little vacuuming behind/under tables, sofas etc would do

If the problem is severe let us know so we can send pest control service and do other preventative maintenance.