Ghislaine Maxwell has been accused by prison guards of failing to flush her toilet, according to court filings - leaving her cell filthy.
The socialite is being held in Brooklyn, US over charges of procuring underage girls for Jeffery Epstein and lying about it under oath.
Maxwell, 59, is the alleged former 'madam' of the disgraced financier, who committed suicide in prison in 2019 aged 66.
Her lawyers claimed earlier this year that she had been abused by a guard who forced her to clean her cell as punishment.
But prosecutors have now said that Maxwell was made to tidy her lock-up as she had let it get filthy, reports the New York Post.
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She is currently in jail at the Metropolitan Detention Center (MDC).
Prosecutors wrote: "MDC staff directed the defendant to clean her cell because it had become very dirty.
"Among other things, MDC staff noted that the defendant frequently did not flush her toilet after using it, which caused the cell to smell."
It has also emerged that Maxwell is "fully vaccinated" against COVID-19 and in good physical health as she prepares for trial.
In their letter to U.S. District Judge Alison Nathan in Manhattan, prosecutors disputed claims she has suffered from hair and weight loss.
Prosecutors said staff have not detected "noticeable hair loss," that the 5ft 7in (170 cm) Maxwell weighed 137.5 pounds (62 kg) last week, and that her lowest recorded weight of 133 pounds (60 kg) was normal.
"In short, MDC medical staff assess that the defendant is physically healthy," the letter said.
It did not say when Maxwell was vaccinated.
One of her lawyers, Bobbi Sternheim, had written on March 31 that Maxwell's detention was having a "deleterious effect on her health and well-being," raising concern whether she would be "strong enough to withstand the stress of trial."
Prosecutors said Maxwell is subjected to regular searches like other inmates at the Brooklyn jail, and has up to 91 hours a week to review materials for trial, more than any inmate.
Maxwell has pleaded not guilty to helping Epstein recruit, groom and sexually abuse three girls from 1994 to 1997.
She is awaiting arraignment on a March 29 indictment accusing her of sex trafficking of a fourth girl on Epstein's behalf from 2001 to 2004.
A trial is scheduled for July 12. Maxwell's lawyers have been considering whether to seek a delay.
Epstein killed himself in his Manhattan jail cell in August 2019 while awaiting trail on sex trafficking charges.
