```python
def thaw_row(row: str, steps: int) -> str:
    if not isinstance(row, str) or row == "" or any(c not in "#." for c in row):
        raise ValueError("Invalid row format")
    if not isinstance(steps, int) or steps < 0:
        raise ValueError("Invalid step count")

    for _ in range(steps):
        new_row = list(row)
        for i in range(len(new_row)):
            if new_row[i] == "#":
                if i == 0 or i == len(new_row) - 1 or (i > 0 and new_row[i-1] == ".") or (i < len(new_row) - 1 and new_row[i+1] == "."):
                    new_row[i] = "."
        row = "".join(new_row)

    return row
```