Cooktop grates replacement cost from tenant's deposit

[Addy Cash]

My tenant left the house (after 3 years) in such disarray that I had to pay $1200 for clean-up and $1000 for repair (it is a 1450 square feet townhouse). I only had $300 listed as a cleaning fee listed in the lease so I am planning to only deduct $300 instead of $1200.

However, the cleaning person was unable to restore the stove grates/grills to their previous state (they were like-new when I left) from years of baked-in grime and grease. I myself tried cleaning them 4-5 times (watching YouTube hacks) but they are not clean enough and the DIY products (ammonia etc.) are making me sick now. I am at my wit's end and think the tenant should take some responsibility.

I want to replace these grills instead of spending more time restoring them and this time I am planning to deduct that cost from the tenant's deposit. What do you think?

1. Pictures of the state of the house when they left
2. Pictures of the cooktop grate/grill after my 5th attempt at cleaning it