DC Sarah Totterdale has given evidence about the first police visit to Mark Bridger's home at Mount Pleasant.
The police received a call to go to Mount Pleasant and arrest Mr Bridger on 2 October, she told the court.
DC Totterdale said heat from the log burner in Bridger's living room was "noticeable as soon as I got there".
She added: "In the bathroom I could smell a very strong smell of Deep Heat. There was a strong smell of washing powder.
"There was a smell of washing detergent and a chemical smell, used for washing the floor or cleaning purposes."
She also described seeing two boxes in the living room full of empty Strongbow cider cans.
Defence barrister Brendan Kelly QC questioned whether police at the house were wearing protective clothing.
DC Totterdale said officers were wearing gloves, but were wearing their own shoes at the scene.
Mark Bridger denies abducting and murdering April Jones, as well as intending to pervert the course of justice.