English to French Science Physics

I remember one lady wrote after spending a few weeks without her ioniser because she had neglected to
order new needles. By the way, these are
the precision-made needles that produce the negative ions. Because oxygen is being produced, corrosion inevitably occurs and the needles must be replaced periodically. Anyway, the lady said that during the time without her ELANRA, she had become unsettled,
tired and depressed. All that changed once her ELANRA had new needles installed and was switched on again.