Something is cooking...

[BIAD]

...The very best Method and I think would be my choice is his underarm deodorant.  
Gain access into his home and apply a very, very thin coat of the Jelly Poison on the top of his Deodorant.
After he leaves regain access and remove the Deodorant and replace it.
Now you can wait and see if news of his Poisoning makes the news.

But this all depends on your Targets Habits.

Thanks again. It seems the door-handle was left uncleaned and I'm unsure that if this was point of contact,
why it took so long to take effect.

I know the MSM's chattering of poison duration keeps swinging wildly and we're left with not knowing the true
length of time it would take to incapacitate the Skripals.

I grasp that the amount applied to the skin, the potency of mixture and the physical factors of health, age
and sex can have a bearing on it's effects. But from the time of leaving the house (the second time that day
that we're aware of)... and convulsing on the park bench is two-and-a-half hours, to me that's a long time.

It was a cold day in Salisbury too, that Sunday.

So with your first suggested theory with the gel, application to the door-knob would've had to take place
whilst Sergei Skripal was at the crematorium sometime in late-morning. Whether Yulia was in the house
at the time is unknown, but she had arrived the day before and this could be a hazard to approaching
Skripal's home.

The Telegraph reported:

'...Miss Skripal was picked up from the airport on Saturday March 3 by Ross Cassidy,
one of Col Skripal's closest friends, who drove her back to her father's house in Salisbury.

Intelligence officers have suggested that the toxin may have been hidden in her luggage,
either impregnated in an item of clothing or cosmetics or else in a gift, meaning Miss
Skripal was deliberately targeted to get at her father.

Mr Cassidy confirmed when contacted by The Telegraph that his pick-up truck had been
seized at the concrete plant in Amesbury where he works...'

So if it was brought into the country by Yulia, then the 'door-knob' theory doesn't work.
(Forgive me for not stating this in the posting above, I've just found it!)

If the Novichok was applied inside the home somehow, that access would need true daring unless
seeing someone visit regularly can be used to not alert any neighbour or Sergei Skripal himself.

Then the problem arises that if an item of Yulia Skripal's clothing or some cosmetic container
was contaminated, how did it arrive in the Queen Elizabeth Park four months later?
How would 'the thing' be thrown away if Yulia only arrived on Saturday and the Skripals
took ill on Sunday...? Wouldn't the poisonous container still be in the Skripal house?

I can see how an assassin could discard the Novichok in an escape route from where the
Skripals took ill in the Market Walk play area, but this negates the 'item-in-the-house' theory
again and means the nerve agent was used between the parking of the car and arriving at
the Mill Public house.

In the same article...

'...Meanwhile, police investigating the murder of Russian businessman Nikolai Glushkov
said they had found no evidence of forced entry into his home.

The 68-year-old was found apparently strangled at his terraced house in Clarence Avenue,
New Malden on March 12,  prompting fears that a new Moscow-sponsored attack had been
carried out on UK soil...'

This could be a lead, but New Malden is over 80 miles away in South-west London.
......................................................

It's the timing from the application of the spray or gel to it's effects that will get us closer to
when it happened and maybe from there, a 'where' can be figured out.